I agree about quality components , but you can buy the most expense matched scope rings and if your base isn't perfectly true then your high dollar rings aren't going to be perfectly aligned.
I have a new Savage 10 FCP-K .308 and during installation of a EGW 20 moa HD one piece base I noticed the top of the receiver (action) wasn't perfectly true ( not uncommon).
So I bedded the base to the receiver and even though the base now fits nicely and true I would still prefer to lap the rings just to go that extra mile.
So in summary unless your receiver is perfectly true and you buy high end matching rings, I believe most scope installations could benefit from lapping the rings.