Oliver Twist picks his first pocket.
Even a thief has steady work.

Tutoring is the most dangerous profession. Even a thief has steady work, but a tutor is subject to the whims of other people, governments and budgeting. If she works for a family privately, they can cancel at any time. Maybe the student only needs temporary help, or a parent loses a job, or takes on a larger expense and can no longer afford the tutor. A tutor's schedule can change from week to week.

If she works for an agency, as do many special-needs tutors, her hours are up for review every year and the government can slice funding and overnight she is dismissed. If her special-needs client is a child, by 21 the child will age out of the system. If she works for a school, her hours are up for review every semester (three times a year) and they can cut hours, even to the point of elimination overnight. She must constantly be on the lookout for other work.

Even the best tutor may have a bad day, or make one mistake, and her tutoring quality may not be quite up to par just once. A family can judge her on that one day and assume she is a bad tutor and fire her. In fact the entire session can be perfect except for one small oversight, and the family will judge her on that.

In this, a tutor is like a heart surgeon, the President, or the guy at the controls of a nuclear power plant. She has to perform at top form and is constantly in danger of suddenly losing her livelihood overnight.

Tutors do not get served notice. What seems like a solid edifice of employment can crumble at any moment, even without warning.