Because using Chromium and Chromium-based browsers reinforces Chrome's market share dominance which will harm comparability as more and more sites will only be tested against Chrome and in many cases refuse to serve pages to other browsers without user agent string fuckery.
It also cultivates dependence on Google for the extension ecosystem, etc
That is not my fault. 99% of those people are just using Chrome. I'm not going to use another browser that offers a degraded experience just to try to right the wrongs of the world. That is not my responsibility. When even a modicum of people start giving a shit about things like web standards, I will too.
Firefox is entirely funded by Google, telemetry and ad networks also, so frankly I'm not sure they're any better.
I see the disconnect now. You're mistaking "open source" for 'inherently good."
Uhhhh no you don't see anything. I didn't say anything like that.
the forks either have to either maintain an increasingly complex list of patches to apply to fix what Google does to Chromium (the browser that runs two thirds of the web) or simply accept it.