Lolth’s 1e design:
I think it can apply outside of the story, but to a much lesser degree. LG people would try to do LG actions if it doesn’t take away too much from them, and the same with the other alignments.
On a similar not, I don’t see creatures being born with an alignment is a bad thing. Devils are born LE, demons CE, archons are LG, and so on. That never prevented them from changing, though. Erinyes are angels who decided to become devils, and succubi were angelic messengers of love until they decided to join Asmodeus while he pretended to be an angel and convinced them that rebelling was the only way to spread their messages of love further than they were allowed (and even as succubi, they can return to being the messengers of the gods after repenting in full, though they keep their succubi appearance). Even than, they have a demon prince of the succubi named Malcanthet, so they aren’t even limited to being lawful.