Second, I'd point out that Sibelius also doesn't allow dragging notes around, and now that I think of it, I haven't seen any GUI notation software that does. Either the developers of all of these apps made the same oversight and haven't realized how obviously critical and non-problematic this feature is, or, maybe the people who responded to you on MuseScore forums explaining that it actually would be a problematic feature are right.
Reportedly, Finale lets you drag notes around. Can't speak for the others.
Regardless of how important anyone thinks this feature is, I could accept the limitation more easily if the application didn't pretend to let you do it and then refuse. To do so wastes the user's time, which should be stringently avoided.
I just installed version 4.1 and it seems a little better than I remember, so I will give it another look.
And how is this "hyperbolic?" A quick search will show you that this is a question that is asked numerous times about MuseScore. Examples:
https://musescore.org/en/node/321194 https://musescore.org/en/node/333696