I can't speak for other people. But for myself I'd rather have it as a --option than another command. I dislike tools that install a lot of different commands, it just gets harder to remember them all.

That argument doesn't make sense at first glance: how is lots of differen't commands harder to remember than lots of different --options?

one command can list all it's options with tool -h?

alias wget='curl --wget', then?