However, there's one problem.
> these people are not "being who they are," because someone else has caused them to "conform to [their] taste/style."
This is assumption based on cultural hints. There have been quite a few times on HN where hackers have proven to indeed not be aesthetes, because hacking marketing requires aesthetic. This goes down to whether or not you appreciate aesthetics of your own appearance, as well.
I don't see anyone making the claim that this is "objectively fashionable". What I see is a bunch of people who rage against a marketing decision because it bastardizes their seemingly misguided need for aesthetic "purity" (whatever that means).
The criticism I'm offering isn't to stop liking your aesthetic preferences. If you don't like beards, don't grow one.
But someone posts a link on HN, and people bitch and moan because the primary subject of marketing is sporting a beard. It really misses the point of HN discussion. Again, I understand if the conversation is centered around the marketing (or other) implications of the decisions made by those who created the product and the site. But the conversation doesn't revolve around that at all. Instead, it's a bunch of "get off my lawn" and raging against trends without any particularly discernible purpose.