I fully agree with you, but the RCBS units aren't all that great either.
For comfort, especially for us with arthritis or other issues with our hands, the bench models and even the old tube and lever system that attaches to the loading press are blessings.
I don't know your capabilities or how old you are but you're judging "everyone" by your personal level of tolerance.
I've met and observed hand loaders that can't operate a hand held because the primer tray confuses them and they insist on taking one primer at a time out of the tray and placing it on the top of the mandrel.
People are all "different" and not all of them "are created equal"