What gestures are you talking about? I think you can turn those off, and I’d be surprised if there isn’t a way to turn off the rest with a 3rd party or custom tool.

Application notarization isn’t a problem anymore- you just have a single accept dialog. That problem that made you do a trick to get past it was only a problem years ago, due to whomever the moron was that thought that was a good idea. The current way is acceptable.

I install homebrew and random apps with no problems.