We wanted to avoid global event listeners as we find they do more harm than good, for the most part. There seems to be two classes of global event listeners:

• Using broad event delegation, e.g. listening for click on the window and checking the target. Event delegation is a good performance optimisation but can often be a premature one. Should a need arise for an element to have such an optimisation, it's probably good to state it explicitly. We don't want people to think it's the default.
• Global events like scroll, resize which often come with performance issues. We wanted to avoid these and instead use better alternatives like IntersectionObserver, or ResizeObserver, which are more targeted and come with better performance characteristics. Again, adding a global event listener for this discourages the use of best patterns.

There's some validity to events that hang directly off of window or document, e.g. turbo events, but we have found these global events better belong to global code, not code controlled by a catalyst controller.

I'll close this issue as hopefully this explains the justification for avoiding these shorthands. If you want to discuss it further though, let's do so!