I think the use of multiple fingers is a better solution than an arbitrary click length. Two finger tap for extra options has been a game changer for me.
For example, I haven't heard of similar arguments for a phone's touch screen, probably because you don't rest your thumbs on the screen itself.
Sure, I could train myself to not do that if I really needed to, but the thing is that I don't need to since I can turn off tap to click.
I'm not sure why phones are different here though. This isn't something I've been conscious of. Maybe it's because the thumb's natural position when holding a phone is to actually hover above the screen? Or maybe touches just register differently enough on a phone that it's not a problem?
Sometimes I start to move the mouse cursor, and then change my mind, after I put my finger down, but before I move it.
This room-for-indecision is totally fine if I'm using push-to-click, but tap-to-click doesn't let me just hang out with my finger touching the mouse cursor.
As a result, if you're using tap-to-click, you are forced to think about what you're doing before you do it. You can't think while in the process of doing it. This means that your finger becomes less of an extension of your brain. You have to keep more private, and inside. You are less embodied.
This works as expected on my Macs with tap to click turned on. see my other comment in this thread.