My biggest issue with installs is not just that you have to wait the first time you play a game, if it gets uninstalled you're less likely to want to play your old library.
If I have half an hour to kill, do I really wanna spend 5-10mins of that installing the damn game? Then if I have to uninstall something else will I have to reinstall that in the future?
Its not 5 mins now and nothing forever, its the threat of installs for the whole life of the console.
Tease.