You should probably read more of what these theorists call mathematical philosophy (I recommend reading a couple of numbers of Erkenntnis, edited by Leitgeb, an

You should probably read more of what these theorists call mathematical philosophy (I recommend reading a couple of numbers of Erkenntnis, edited by Leitgeb, and perhaps taking this course) before passing such a harsh judgement. As a sidenote, the kind of foundationalism about mathematics that you seem to endorse is not the only option in the philosophy of mathematics -- although this issue is largely orthogonal to the prospects of mathematical philosophy.