Just to be clear I want to explain what I understand to be a tonal scale. To me a scale is tonal when there is some kind of irregularity in that scale that makes it possible for someone to immediately "feel" the position of a note in that scale. The most widespread and most recognized scale being the major scale with its two semi tone steps. I'm not even getting into if wether this scale has "natural" origins or not, that's not the main issue in my opinion. I think every western child can whistle a C-major scale without even knowing there are 2 semi-tone steps in it. It will be much harder to learn to whistle the semi-tone scale (12 tone scale) or the whole tone scale despite the fact that it are scales without irregularity.
For me the succes of tonal music lies in it's ability to grab the listener and say "at this moment you are here" and "at this moment we're going there" or "and now we're going somewhere similar then before but a bit different". With all the infinite combinations and modulations that are possible.
In atonal music these possibilities are somewhat limited (or more challenging). And even more limited if you really want to rule out all connection with tonality. And also probably the reason why it's challenging for the listener and often subject of deep filosophical questioning