I love the idea, especially for making adult and elder sims. It's the most annoying thing to make a middle-age sim who starts off with no skills and no career history, like they've been living in a bubble for 40 years. It's such a chore to decide and then cheat in all of the personality and life experience they should have. So this feature will be very useful for me.
I hope it will also take into account an imagined childhood, like giving the gifted traits they might have earned from childhood aspirations, or if you have parenthood installed, maybe some character traits they would have earned from aging up to adulthood.