They buzz around the same bit of sky in the same spam can that they never really mastered.
Don't waste your time worrying about such people: they quickly become bored, and then fade away from aviation to take up golf or whatever.
There are many (perhaps infinite) interesting challenges to flying, but one has to seek them out ... if one just bores endless holes in the sky, feet on the floor and one hand on the 'steering wheel', it is little more than an expensive waste of time.