Well...Golett evolve by leveling up, don't they? And from what I have read, it takes a long while for them to get to the level of evolving. Maybe she'll have grown and matured enough in that time to be ready for it.

[It's at level 43 so...it has to be a long time.]

I would imagine as well for Pokemon caught in the wild that they have evolved parents and know what they're in for down the line.