I think looking at "professional" areas isn't fair. The idea behind OP's comment is that there is still a rather high range of income that you can get to on an

I think looking at "professional" areas isn't fair. The idea behind OP's comment is that there is still a rather high range of income that you can get to on an "if-then" basis. Becoming a top-tier, MM lawyer is hard, but there is an instruction set that guarantees you'll be able to do it if you follow that instruction set. The more "random" aspect of it is if you actually have the predisposition to actually be capable of following that instruction set.