In the same way that not everyone cares about how their car works and wants to tinker with it and modify it, but they use it every day - there are people who feel that way about computers, and Linux being viable for those people is a good thing, and we don't need to "dumb down" the whole ecosystem to do it, since Linux is all about options.
What you just said is like "I forgot that changing your tire/oil in 2024 is akin to surgery". Yeah, it's not that hard, but do you know how to do it? How many Linux users who drive a car do you know that could do it themselves correctly? Everything's easy when you already have a breadth of knowledge on it.
Well, they'd need to add a shebang, they'd need to set the executable bit, and if it works, it works, but if it doesn't open a terminal (some DEs do, some don't), you don't even know if it worked, it's not really that straightforward.