I am not sure whether o-rings really do that.
They do not make it less likely that you bottom out, or teach you not to bottom out. It is just that when you do bottom out, the sound is a little dampened that is all. I do not think it makes touch typing any easier really, or at least I did not think so. If you are the kind of person who bottoms out on every keystroke, you might find yourself enjoying the slightly smaller travel of the keys and the softer landing though, and that might be beneficial for your typing.
It is such a subjective thing, that I think no one can really tell you whether it would make your typing experience any better. I happen to like them, both because of the shorter travel and because I actually enjoy the softer landing (which to me, is not mushy, as some describe it). But I get the sense that a lot of people just put up with them for the slight reduction in noise. I think that you will find that most people find it has a negative effect on the overall typing experience, but that does not mean that you will feel the same way.