It helps if you're doing mundane things and want to help people who need to mix their sensitive traffic with it.
More people "legitimately" using Tor makes it less likely to have its exit nodes outright blocked, as well, and assuming all traffic from them is malicious.
I think using tor in brave just makes you stand out more - stock tor browser is probably a better setup. Whonix even better.
It helps if you're doing mundane things and want to help people who need to mix their sensitive traffic with it.
More people "legitimately" using Tor makes it less likely to have its exit nodes outright blocked, as well, and assuming all traffic from them is malicious.
That's charitable, but even then you probably want to avoid fingerprinting...