"Feet outside suck. People need to learn how to smear better."
"Outside, the holds are not always comfortable."
"Well, Problem X at our local crag has this huge move in it that no girl can do. This move is just like that one."
Yep. Sometimes, outdoor climbing is unfair, sharp, and miserable.
It also rains outside, but I don't see anyone trying to patent a climbing gym weather system.
The bonus of indoor climbing is that the variables are controllable. Using outdoor conditions as an excuse for bad routesetting is an easily avoidable trap.