If it wasn't for servicing and repairs most bike shops would go bust. the margins on new bikes is very, very small.
We always test ride every bike and then get the customer to do the same before taking the bike away.
Servicing a bike to most people on here isn't difficult but a lot of people just don't want to do it themselves and why should they? I'm perfectly capable of working on my cars and motorbikes but I just don't want to and have enough disposable income to pay people to do the work.
I don't work on my modern bikes either - I just take it into the workshop and tell a mechanic to fix it.
Wouldn't let them touch my Penny, though.