Buffalo lil

I went to pay at a till as I don't support self-check outs and the July 9th, 3:30 manager points me to a self- check out and I asked if there were any tills open and she rudely says yeah that one pointing to the self-check out. She tells me the employee will do it for me. THE ISSUE ISN'T THE LEVEL OF DIFFICULTY, it is the fact that that employee will soon be obsolete and most of the starter jobs for our children will be gone. I put my things away and will do the same if they don't have a till open next time. Manager needs an attitude adjustment. Is this an issue of laziness or cheapness???