For example, it's vitally important that wayland resists adding features like title bars, window icons, resize handles, desktop icons, or mouse cursors. These frivolous features have no place in a serious desktop environment! They are only bloat!
"tantrums" is when you expect windows to be delineated with borders apparently. You got the Wayland attitude down pat: are we the problem? No, it's the users who are wrong!
Indeed, we agree.
We just need to do the hardest part: keep it clean and simple to not particularly discourage alternative implementations... on the long run.