Why would a parent not want their children to watch characters?

I was working today and we sell personalized music, and this lady came up and didn’t want to hear mickey mouse, barney, or elmo because the child she was buying it for her mom wouldn’t let her see disney characters or any others other than The Disney Princesses and Veggie Tales, so then I asked her if it is a religious thing and she said no had nothing to do with religion, and I don’t understand it because they teach kids good things and are good for them.