Difficult to disagree. However if you use 20h, you're probably doing it wrong and should use w/e/f instead.

Usually, yes. The two places I find myself using a count on h or l are 1) in nonce key bindings, and 2) when there's a lot of instances of what I want to jump to near the start of a long word, followed by a gap without the character, followed by where I want to jump. If I'm faced with www.wikipedia.com/something/wouldyouchangethis it's simple to say 10lfwcw - if I'm off by 5 in either direction it doesn't matter and ballparking like that is easy.