No, I am clearly not saying any of those things. I don't think most shop assistants had the job in mind for a career. In fact, all the statistics show that people in less powerful positions suffer the most stress at work as they feel they have no control over their lives. It is, of course, highly likely that people in low paid jobs are unable to afford as much help with chores and child care.
If it makes you feel better, substitute dinner ladies or any other low paid job for shop assistant.
(I am amazed that a casual choice of a single word could give rise to so much interpretation!)