It’s not anti-consumer to make an imperfect product

There is literally zero reason to use WAV over FLAC, it has no compression or native tagging support.

Ripped CDs or FLACs downloaded from Bandcamp

FLAC and WAV are effectively the same thing as far as audio quality goes. FLAC has the advantages of compression and better tagging support, so there’s zero reason to use WAV.

It’s true that most people won’t be able to tell the difference between something like 320 kbps MP3 and FLAC, but for archival storage there’s little reason to use anything but FLAC. I also have a bunch of those FLAC files transcoded down to VBR MP3 to put on my phone.

I don’t understand why people get offended by this sort of thing. Just don’t give a tip!

What are you trying to get out of reviews that’s lacking? Outside of an obvious flaw that justifies saying “this is objectively bad” most headphones are fine from an objective standpoint. Beyond that it’s basically just the reviewer saying if they liked the sound or not, and what other headphones it’s most similar to. You have to either know what reviewers have similar taste to yours, or have heard enough other headphones for the comparisons to be meaningful. Without either of those, no, reviews aren’t really useful.