Sharkbite fittings not UV resistant?

This question is specific to the UIP4020 1" copper to pvc coupler. I had a sprinkler repair company out at my house today looking over something and he pointed at them and said they are not UV resistant and will need replaced in about a year. Said the plastic part specifically. He was talking about my couplers to my Flow Meter.

Is this true or is he clueless?