re: Handball practically in the goal

none of those are really comparable (well at least to today's play), the touchdown pass could be dropped, the guy could miss the layup, the hockey player could shoot wide, etc., etc. I get that people think it would be too arbitrary a rule but those aren't comparable to a ball that is obviously going in the net unless someone keeps it out with their hand.

The problem with the rule would be the situations where it would be too much to interpret, i.e. if a ball looks like its going in but it could have possibly hit the post.