For many people this is a non-issue. I think this a case of just accepting we are different and don't need to force our view on everyone else.
Maybe 15 years ago I had a mouse with a tilting scroll wheel (for side scrolling), on that one I did have issues with middle click, for about a month until I got used to clicking straight down.
So maybe it is just a question of practice? Maybe not. But since both options exist there is no need to get upset.