In what world is a browser worth $500? For comparison, a complete operating system (eg. windows) has cost around $200, and this was applicable even in windows 98 days, before microsoft was trying to monetize it using ads/telemetry.
Well the reality is that there are two browser engines that are free and open source. If they built their own that was better than the incumbents (eg. from performance/privacy point of view), then I might consider it. But I'm not paying $5000 for a chrome reskin, just like I won't pay $5000 for a debian reskin.
When buying software the cost is heavily impacted by the number of users that benefit. Windows is used by >100m users, a new browser is probably doing well if it's used by >100. Of course the price is different.