The whole point is to CHECK that it has all been done correctly - 99.9% of the time it is correct, but the other time would you rather have them discover that they've done it wrong there and then, or you to find out when you come to pick up the car and go home only to notice an issue?
I'd rather they use their aligning equipment to check my alignment rather than them taking it out on the road to see if it pulls to one side and if it doesn't it's ok lol.
You do make me laugh sometimes.
