I dont rag on people that let the LBS do small things for them. Some people have no clue about anything mechanical, but are excellent at doing something else. This is what the LBS is for and even the smallest service charge helps the LBS stay in buisness and pay good employees, so we can ask for their expert advice on more technical issues that we may not understand.
My neighbor dosent have a clue about a lot of things mechanical, but loves to ride. I have mechanical skills and pass on my knowledge to him and the use of my tools. But he's awesome at being the buisness/banking guy.