If you think broadly about gear advice, then every source brings some level of bias.
Your best friend’s view is limited by their own experience with brands. I have friends whose parents had McIntosh gear and they love it too. Good stuff with a great heritage but can be too warm for people. I have a soft spot for Vandersteen, TEAC, and Philips turntables since my Dad owned it.
Your favorite YouTuber may also sell brands to create income. Some influential ones take advertising to help on expenses. Some may do consulting for fee on the side. Some may be involved with the manufacture of a new speaker.
Your favorite audio fora may take advertising for certain products and shut down discussion of competing products or negative aspects of the product.
The critical part is who do you believe? I think the answer involves reading reviews, understanding the technology, and finding which source of information matches up with your own experience and sound preferences.
Although Elliot and I differ here, I value his commentary and opinions given his length of experience in the industry.
If Tim A comments here then I place high value on his words because his writing shows a degree of thoughtfulness and experience.
If Michael Fremer gives me a suggestion on turntables then I am all ears.
If Jim Smith suggests I fire the LoKe subs into the corner of the listening room then I complain about how much they weigh
and turn them around.
We all are on this journey together and I believe the real value of the journey is keeping an active mind, interacting with friends, and enjoying the final result.