I don't get it either, when people find out I can sew they immediately think I can do their mending and alterations, which I hate to do. My favorite dry cleaners fixes my stuff for me.
When I started a sewing class at the school I work at, all of a sudden the staff is asking us to mend/serge/put on buttons, make them stuff, etc. Geez, the kids were just learning to sew themselves. So I drill all my kids on how to "just say no"!