Right, you can't do it without hardware buttons. However with hardware buttons below the track-pad I can easily use it with either hand alone and still be fast and accurate. Therefore having hardware buttons below the trackpad is necessary for me, it is so much better than using anything else feels horrible.
Edit: Rereading my original post I guess it is possible to think that I say that virtual buttons are better. What I meant that the thumb rotating like that on the trackpad screws everything up. Sorry that I wasn't clear.
But one's thumb doesn't rotate like that. If one needs to make one's thumb rotate to use a trackpad with a thumb and another finger, that trackpad must be the size of a sheet of paper.
I'm probably misunderstanding. I think I'd need a video to understand what you mean.
Edit: Rereading my original post I guess it is possible to think that I say that virtual buttons are better. What I meant that the thumb rotating like that on the trackpad screws everything up. Sorry that I wasn't clear.