The problem is when someone says if you haven't tried some very expensive fuse or piece of wire, you don't know what good is. That's always going to cause friction, especially is one of the protagonists is selling the product in question.
I use several Belden cables, including $10 ethernet cables and speaker cables that cost me $140 and are exactly the same as someone here is selling for $6,000 (after buying from Belden and frying for a while). For me $6,000 is about 40 ballet tickets, or 25 opera tickets, or perhaps 100 concerts or recitals. Whatsbest for me is always live music, and hi-end audio is always going to be vastly more expensive and not even get close to the experience of live music.
I think from a point it's just boys' toys, just like anything else like cars or watches, which is perfectly fine if you have the disposable funds. That's the definition of a hobby. It doesn't have to be justified. If you get a kick from it, then great.
That's my general viewpoint, others will come from lots of other different angles, some may not have access to live music, some like collecting records, others may just be here to sell stuff. Arguments tend to arise when one person is so far down their personal rabbit hole they can't see the other's point of view. I've made a living in dispute resolution for over 30 years, the key to which is understanding your opponent's viewpoint. I have no problem with conflict, it doesn't bother me at all, what I don't like is dishonesty, arrogance or superiority.
I only joined this forum because there was a thread about Garrard 301 and I wanted to do one for a sensible price. It turns out I went much the same route as the forum member. It's now done and the system is finished, the cherry on the cake yesterday was fitting a cartridge I bought in Tokyo a couple of weeks ago.
I only know two audiophiles and the best way to avoid arguments and remain friends is not to discuss audio, something we've maintained successfully for years.