I think it's still "legitimate" at 40, you want ratings to matter right? Or do you want everyone catching everything? You don't want a 72 overall playing like Larry Fitzgerald right? Some of these guys drop balls because they think of the run before securing catch or they hear that head hunting safety coming to light them up. I've seen Dez, Aj Green, Odell Beckham have more than 5 drops a game each before. It happens. Not to mention dropped catches help Qbs get realistic passing %.