It seems engineers are far less dogmatic than audiophiles !
Some are... I think engineers are more likely to understand the inherent compromises in different designs, and how those compromises have pros and cons in different use cases. Product design requires, hopefully, a deep understanding of the compromises made by design decisions. They're also more likely to understand bias and thus see things more neutrally, and with an understanding of subjective preference. People don't value the exact same things as everyone else in life, and so there's no agreement on what the perfect speaker is, or the perfect car, or well.. anything.
Speakers are a good example because it's very easy to see the differences in speakers. Audio in general has not converged on the perfect speaker design, as everyone has different preferences that match up with the compromises made by different speaker designs. Preference for a particular speaker design is often a result of what music the listener enjoys the most. So unless you can determine what the best music is, you can't say what speaker is best, and it's pretty obvious that isn't possible.
As a result, anyone who has a dogmatic view of audio is wrong, because it's all based on subjective preference. For example, if you think balanced is always better, it's not. It's better in some use cases, but provides a solution to a problem that doesn't exist in others, in which case all it does is complicate the system for no benefit. It's often a detriment to add complexity without a reason for the complexity. This is the real truth in most home systems, there is no interference present that requires using balanced gear, a simple high-eff speaker like a single driver with one source might be best with a SET and single ended cabling. Balanced anything is a downgrade in that use case. OTOH, if you're setting up a big PA system that has tons of gear, tons of cables, many of which are often very long, and setup in a way and place that often has external interference, you need to use balanced gear to avoid problems. This is why balanced was invented and why you probably don't NEED it for a home 2-ch system, but you might need it for a big home theater with all the power and electronics setup in a large closet.
With SET amps, we all know it's favorability is entirely dependent on the speaker. With the right speaker, it may be the best choice. Other speakers will require more power and a lower output impedance to produce a superior result.
This is also the reason audio reviews are difficult and negative reviews are often not thorough enough to hold credibility. I can say from over 10 years of sending people demo cables and hopefully helping them achieve their goals, that for the reasons previously stated not everyone prefers the same thing. Despite that, there are better and worse products overall.
What I've noticed is the better I can make a cable in objective terms, the more the feedback on that product converges. Objective improvement in cables means the electrical and material properties of the cable improve, the result of this is the cable adds less of it's own character to the sound. When a cable adds its own character to the sound, it means it's not as good in some objective way, and is less neutral. The result of this is the divergence of subjective preference. in other words the reports I get back from people trying my cables differs more, if the character the cable adds to the sound is preferred people like it, if not they don't. The less character the cable adds, the more the feedback converges. I've found this equates to more predictability in recommendations and an increase in subjective preference for that cable. But there are always exceptions as some people want a particular character. In cables, this character is almost always warmth. So in some cases I do offer a warmer version of a cable... I'm starting to get away from that though, and just focus on objective superiority as I believe this will result in the best long term result. Over time preferences almost universally trend towards neutrality, meaning people value warmth less as their system improves, which makes sense as warmth covers imperfections. However, imperfections can come from the recording its self, for example a warm system is great for blasting Led Zeppelin at realistic concert SPLs. It can also come from hearing damage. So the subjective preference for warmth is NOT WRONG, it's a result of being a human with their own preferences.
Ok, I only intended to write a short reply to the quoted statement, so I'll stop here, but I hope this helps a bit with understanding the exceptional complexity of reviewing individual components used in complicated systems when combined with personal preferences. It's challenging and complex, but that's what also makes it interesting and rewarding.