Brave/Edge/Vivaldi/Opera are all Google controlled browsers. Just because you can slap your own logo and build a sync system on top of Chromium does not mean they get to have any say in how Chromium consumes the Internet.
Sure, less data gets sent directly to Google. But when Google says[1], Chromium will not allow you to completely block autoplaying videos, it takes years to for the clones add an option to block[2].
[1] https://developer.chrome.com/blog/autoplay/ [2] https://forum.vivaldi.net/topic/40377/option-to-disable-auto...
Sure, technically they're Chromium, not Chrome, and probably you don't share your data with Google (though who can say for sure). But whichever you choose, you're still allowing Google to control the Web ecosystem, from web standards to ad blocking.
Who says switching away from Firefox means you have to switch to Chrome, the Google-controlled browser?
That seems like a false dichotomy to me.