In an ideal world, yes it matters. Would be nice to have at least 5" if not more, to play with.
But since I had an invisible dick before (yes, truly teeny!) and got decent growth, which translated into a very small dick post-op, the fact that I actually HAVE a penis, even though very very small (toddlers are probably more well endowed, LOL), I'm thrilled to have what I have. And after seeing pics on the net and Howard Stern's small penis contest, I know that lots and lots of cis men have very small penises as well. I'm short, too. I deal. At my age, who cares? LOL I'm thrilled beyond belief to have balls and no vag.
If someone could swap out my junk with what your average man has, without having to have surgery or take antirejection drugs, ie magic wand, sure I'd opt for larger junk. But it aint gonna happen, so I'm realistic and accepting of what I have. And thankful that i was able to get it.
Jay