The contents of the license are irrelevant, because such training is not being done under that license at all (or else it would already be violating it, failing

The contents of the license are irrelevant, because such training is not being done under that license at all (or else it would already be violating it, failing attribution at the least—and it seems likely to be fundamentally impossible to comply, just like a human could not comply if human learning was subject to such licenses). It’s depending upon copyright restrictions not applying to it (under “fair use” doctrine).