At the same time, I'm sure there are mechanics that love Ferrari, know everything about every Ferrari ever made and don't want a job where they don't get to work on Ferrari's. I wouldn't see that as sign of lack of professionalism.
I think it's more like a professional mechanic wouldn't be happy being oil change technician. A professional mechanic may love Ferrari's, but also jump on the chance to work on Porsches if that means working on a GT Racing team.
