Maybe the case I have changes this, a bit. However, after reading your comment, I tried with a light finger / touch, and I observed that even with this case on it, I can manage. I stand corrected! (And thanks!!)

It does start to rock if I don't hold my touch light, particularly towards the corners and the "bottom" in portrait view. Poking the back button is particularly touchy.

So, I stand partially corrected, I guess.

Anyhoo, I'm still to the point of placing function ahead of form. Or I'm just getting old and grumpy. 50/50, probably.