It's funny...on one hand I can understand the league turning a blind eye on PI challenges unless they are as bad as the Saints miscall. You don't want to have so many instances of judgement calls to be made on any throw where there is some contact.
But it's becoming a much worse look for the league when coaches just have to sit there with their hands up because plays with pretty obvious PI (or called PI that shouldn't be) aren't worth throwing the flag for because every fan, every player, every coach knows they're just going to pretend like they don't see shit on replay and stick with whatever the refs called on the field. I understand not wanting little shit like hand battling back and forth to have to get judged, but there is just some obvious shit that they absolutely could be fixing with replay that they are refusing to do so.