@benjamin-hall
Not a WTF IMO. On Linux, almost nobody (except recent Windows converts) will even try to double-click on an executable file during normal usage.
Software is distributed either via the official package repositories or as a downloadable package. Those will install .desktop
files to ensure they're launchable via GNOME Shell and every other application menu out there.
The only thing that's often distributed as scripts (yes, this is a generalization, but at least 83% accurate) are developer tools or other tools for advanced users. Those almost always come with instructions on how to start them from the command line. And in this case, that's a good thing, since it signals to the inexperienced user that they're doing something advanced.
Bottom line: I cannot see a really compelling use case for double-clicking executables in the file manager on Linux and removing that feature prevents people from doing that accidentally. Sounds like a good idea.