Fat Exercise Instructor

If an exercise instructor gives a good class, would their appearance, i.e. weight matter to you? Would you be turned off if you hired a personal trainer and an overweight person showed up but they did their job well?

There was a situation in which an instructor was laid off because of weight.  People are not motivated by fat instructors, thinking - if that's how the instructor looks WITH exercise, well ...

I'm undecided.  If I really liked the class, then of course, I would be sorry to see the instructor leave, but I can see that people would be perturbed by a heavy exercise instructor.