I don't believe it's useless.
My first thought when I first saw it was:
Are today's simmer such doorknobs that they get flustered when they see a list of traits and can't make a decision?
They need to be hand-held through the process?
But if you use the old randomizer, I can see this being a better alternative because you can have some randomness, but it has a bit of purpose as you will be more likely to make a sim you like and not have to make so many attempts. I hope we can use it on the homeless sims in the world manager. It might be a fun way to edit them.
I might not use it much, but it should be useful to someone new to the game.