I don't really care what job the premades have. But I do keep track of what jobs and level my sims have in my biggest save because they are too many to remember :)
I was just thinking of something related to this the other day actually, although it had more to do with townies than premades - and the opposite, but there are so many single household sims created by the game that just run around unemployed, like what's the point of that? If they all got a job within a little while then maybe but there are so many elder townies my sims have known since they where YA's and they never were assigned a job in the game.
There is simply no need for that many unemployed unplayed sims.
I wonder what the ratio between unemployment and employment is among the townies. Staggering in my saves, that's for sure.