They refuse to do it because the idea has absolutely no merit to it. If there's a virus on your computer that could steal your data, it can just wait till you unlock that data to steal it. There is zero practical benefit to implementing your suggestion.
Let's not forget one of the biggest investors is a right-wing billionaire who runs a corporate intelligence agency that contracts with the DoD. And the only proof we have that he doesn't collect data on Brave's users is the questionable word of the devs.
I don't pirate because I'm opposed to paying for things. I pirate stuff because I don't want to support scumbag corporations that don't give a shit about me. In fact, I buy most of the media and games I consume, in order to support the devs behind it.
And that's not a "new piracy gen", that's how piracy has always been for most people. You're the odd one out here.
Jackett is pretty good, but you should really check out the *arr suite of apps. And when you do, you'll find Prowlarr is quite a bit better than Jackett for finding just the stuff you want.
They refuse to do it because the idea has absolutely no merit to it. If there's a virus on your computer that could steal your data, it can just wait till you unlock that data to steal it. There is zero practical benefit to implementing your suggestion.