I already wrote in another comment, but since you're asking here, I'll add i to this thread:
You probably shouldn't use Brave over Firefox (and it's forks), at least not as a primary browser, but it's a great out of the box plug and play browser for average people, most of which are probably currently using chrome with no ad block.
If the average user was decently tech literate, companies wouldn't buy ads any more, because they wouldn't make anything off of them, since people don't watch; but obviously they do.
The average person doesn't want to have to install an ad-blocker - hell, the average person probably has no real idea of what an ad-blocker even is - and they don't want to bother configuring anything either. They just want plug and play applications that will do everything they need. And for that, Brave is probably the best. E.g. if a family member called me asking for a browser recommendation, I'd probably just tell them to install Brave. I think I'll keep doing that until I see a better plug and play browser.
Some sites won't work properly with LibreWolf (which is typically when I switch to Firefox), and sometimes LibreWolf has to explicitly ask for my permission before doing certain things on certain sites - which is something I like, but it's also why I wouldn't recommend it to an average Joe like my dad, for example.