I certainly hope so. I think the whole "insanity" thing never sets in because everyone tells them that ballroom dancing at a high level is an unattainable goal. Never do they question, "wait, then how come that 7 year old can dance better than me?", or, "if my coach (or even, coach's coach) never attained that level, how could I possibly get there?!!".
I think the biggest problem is actually knowing what the outcome can be. You always trust your teachers to be infinitely educated when you first go to them - you need a critical as well as accepting mind to realize when you have reached the limit of that teacher's abilities. I think thats the real basis for DSV's brilliant quote 'when the student is ready the teacher will appear': the real reason is that the talented student eventually sees through teacher A and looks for a new one to guide them through the next stage.
I find myself going through teachers rather rapidly in my violin studies - I have a pretty good idea where I am going. In dance I've gone up by going back! My once and present teacher blossomed in the period that I went off to do AM dancing. He is truly amazing now.