Yeah, especially the argument about Wayland compositors taking down all apps with them when they crash: that’s just bad, no need to sugarcoat that.
A better argument would be that it’s not true: KWin keeps Qt apps alive, and they’re working on extending that to all apps. As a result, in the only crash I’ve experienced, I only lost my Firefox window, and zero data as all my tabs and form entry values got restored when I started it again.