The first point is flawed and even TOR doesn’t execute javascript because it’s impossible to catch everything when you give the server full code running capabilities.

The second point is more plausible but there’s an incredible amount of work to do to fix this. Like, needing to rework browser engines from ground up and removing all of the legacy cruft. Brave is not capable of this and never will be no matter what they advertise because it doesn’t have it’s own engine.

That being said, these tools will get you quite far against commercial fingerprint products especially ones used for Ads but that will also ruin your browser experience as now you’re just solving captchas everywhere 🫠