As a user I actually like Gatekeeper. 95% of the time it's not a problem. the other 5% of the time I have to click a button in my settings to allow unsigned code. But at least it gives me pause to think about the source and if I really trust it (which is mostly offloaded to Apple the other 95% of the time).

Free business idea: get an Apple developer account and then agree to sign code for other people in exchange for a small piece of their income. I'm surprised that doesn't exist yet (or does it?).

If that isn't already a violation of the developer account ToS, it would be in short order. The dialog is about keeping normal non-technical users (Apple's primary market) from straying away from the App Store where they can collect 30% and analytics. They're not protecting you, they're herding you.