Ye but only the radiant's team would have fun. Imagine being a silver or a gold chilling with your mates in ranked and you get a radiant on the enemy team who's just kicking everyone's ass while not even trying
the game puts similar elo against similar elo. If 4 silvers and a radiant are in queue, the game will (try to) put them agaisnt another stack of 4 silvers and a radiant
the obvious problem with this is absurdly high queue times
Its better to lose a tiny amount of rr and play with your friends than lose 20+ rr playing against radiant smurf accounts who couldn't play with their friends before.