The more Gatekeeper, the more used people get to clicking OK without considering what it means. No amount of software can prevent the social engineering of an actual malware that tells the user to just click that OK button that they already have to do on a regular basis. Less is more here. It's why Windows tuned down their UAC after Vista.
It is not a consent prompt. You get a choice on whether to trash the binary or quit.
To run a non-motorized app requires you to open a separate app, navigate to the security section and select that you want to authorize the app to run.
Apple does not have any desire to make distribution of non-notarized binaries commercially viable.
And we've seen this change across all browsers. There no longer is a "continue" prompt for TLS issues. The result is, way fewer maintained sites go months with an expired certificate.
Predefined value on current macOS's Gatekeeper is "move to Bin" instead of OK. Other option is Done - which cancels opening action. If you want to bypass that, you need to go to system settings > privacy & security and manually allow particular app there.
