I'm not one that thinks that irons are any better for learnin, I don't think it makes a tinker's damn what they learn on. So why invest in a scope if it doesn't make a difference. Use what ya got.
I know the argument that iron sights are more durable, but durable as they may be, I have seen lots of people show up to the public range and my range with guns where the iron sights needed to be adjusted and resighted-in because something happened to them.
I can tell you this, scopes, even most of the cheap ones, are more durable than the irons they put on most rimfires. Broken my share of front and rear sights in the field to know. Never busted a scope though. Durability of irons is over rated, durability of scopes in underrated.