I think this is a matter of taste
I like gnomes toolbars, and I like macOS’s UI. Gnome mimics macOS a lot. A menu/title bar in gnome can have buttons, search boxes, really most types of control, which I think results in richer apps.
KDE mimics classic windows UI, and I find the toolbar and title bar layouts are not what I like. Overall I just find KDE has a lot of empty space on its windows, and it’s fairly constrained in what kinds of buttons can go into the menu bars.
I think many people like KDE because the title bar is just title and close buttons. I find that a waste of useful screen real estate.
I was being a bit hyperbolic, but I don’t like the feel of it at all.