memes

I can't even begin to understand what you mean by this. It sounds like maybe you're an iPhone user, which has almost no native universal controls. Android has options like gestures or a digital button bar, which allow for universal navigation from the same location that physical buttons would be in.

I don't use iPhone. I mean the button does not move, a touch interface might require input anywhere on the screen.

Those buttons are contextually dynamic. You wouldn't be able to use them without looking at the screen anyway

They are dynamic, but if you are doing the same task, they will do the same thing. Meaning if you are habitually doing a task, you can memorize it.

How are you firmly gripping buttons without pushing them? This makes no sense.

I am talking about gripping the whole device, not holding buttons. On a touchscreen device the whole thing is a button, so you only want to grab the bezel, which is as tiny as the designer can muster, to avoid accidental input. This makes for a less firm and ergonomic grip.

It sounds like you have rose tinted glasses inspired by the inferiority of iOS, but I'm making assumptions

You are indeed making assumptions. How do you conclude that advocating for buttons is tied to the device that revolitionized the industry towards touch only?