Then there's no harm.
Actually, adding more work to the servers is in fact a kind of harm.
Or should we get rid of Scrimmages now since "most people" don't train players themselves and just buy pre-trained players?
This is a entirely different subject. The scrimmages aren't only for training. They are very importante in the manage of the game shape. And you already told it: somebody else use it for training, so it is necessary.
But, anyways I am not against the idea... so You don't have to convince me.