I'll spare you incompetence stories. Is this ultimately something to do with the nice culture of praising pupils all the time, banning winning at sports day so in the end no-one learns to be self critical but assumes that everything they do is just great, perfect even. My definition of a professional is someone who learns, all the time, who after every job asks how it went, could they do better. Doesn't matter if you are the cleaner or the consultant, if you don't learn from what you do you are not a professional.