As a USER, not a developer, I want the option to turn off the individual security methods at my discretion. I don't keep applications in the /Applications directory unless they absolutely won't run anywhere else. I do run apps from dmg's when I only use them on rare occasions. Before running any installer, I examine it using Pacifist. Not all developers of apps can afford the Apple cert. Not all developers want to go through the App Store. I endorse macOS being shipped with maximum security turned on. But I reserve the right to selectively turn it off while accepting the consequences of my actions. I don't use iOS devices because of this. And if macOS closes all pathways to users being innovative in their software designs, then I will be queuing up a version of Linux.