Do you do more than one thing consistently well? Nasty person. Don't you know never to be good at more than one thing? Because there are pigeonholes, you know. And people like 'em.
Pigeonholes make life nice and tidy. And there's nothing worse than a pigeon to whom you assign a hole who thinks they should have more than one. It's greedy and defeats the whole purpose of world order and clarity.
Besides, with the unemployment rate as high as it is, by doing many things aren't you hogging the work? Why would you want to do that, eh? Don't you think you should be letting other people practice at being good at what they do?
Oh sure, you may think you're a polymath, a true Renaissance person – a great thinker like Leonardo (da Vinci, not DiCaprio). Just who was this Leon Battista Alberti guy, who said A man can do all things if he will? No one talks about him anymore, nor is he on anyone's cocktail party list that I know of.
So you folks out there who may be a multi-talented All-Star, dumb it down for the rest of us will you?