I wouldn't exactly call it lazy. I can see the parallels between Leo and Dick, Tim and Donnie, and Jason and Raph. At least enough to get why fans constantly make the comparisons. it only falls apart when you add Damian and Mikey into the mix. The only thing they have in common is that they're the youngest brothers. Aside from that Damian is much closer to Raphael. Then again, Damian and Jason are also more alike than I'm sure either of them would care to admit.