That's a pretty confidently wrong statement.
You're aware of Wikipedia, right? More directly relevant: Konqueror?
And as is typical of HN, you seem to be unaware that people might be motivated by things other than money. Browsers are a large enough undertaking that you need some money to make one sustainably, but when money isn't your primary motivation it turns out you can do quite a bit with less.
> There's a lot more privacy features built into Brave than there are in other browsers. It's user oriented, not adtech oriented.
Brave is literally adtech. They sell ads.