My counter would be what if this person sat here every session and simply exercised more xp expenditure discipline and built the same PC over time? How is that even remotely different?
I think you know the difference. But for those unsure, developing a PC over a series of sessions while playing with a group will, or at least should, make there advancement choices be a mix of personal desire and complementing the group. I don't mean filling a particular role or mechanically fitting ones PC in in the sense of being just a cog in the machine but complementing the other Players. As both a Player and a Character you are part of a team. This doesn't mean that the new player wouldn't have laser focused on their Charm but that it would have developed along with the group and had to experience the drawbacks of taking such an approach not just getting to skip ahead.
But again this is irrelevant because if the established players and the GM are unhappy then something needs to change and it's beholden on the new player to initiate the compromise.
Edited by FuriousGreg