As usual, I have little of worth to elaborate on Badger's excellent point
However, I met one of the series four finalists some time ago as we both work for the same company, and she said that a good 50% of former contestants have had their professional lives ruined by The Apprentice. Many of them because they were actually utterly incompetent in the first place and demonstrating this on national TV was an unwise career move.
(Darth Foxtrot A one-man army dedicated to making fetch happen, Wed 11 May 2011, 9:40, 1 reply, 15 years ago)

Of this I have no doubt.
It's a painfully steep learning curve discovering how out of your depth you can be. Doing this, willingly, in front of a large TV audience? Insane

However - can I be clear about this - however ruined their lives became, they couldn't possibly have deserved it more.
( the mighty badger Aphrodite, on a bar stool, by your side, Wed 11 May 2011, 9:46, Reply)

I quite agree
I can't think of a clearer example of the directly proportionate relationship between the amount of pride one shows and the size of the subsequent fall. Helene, the aforementioned finalist, was absolutely lovely, lucid, intelligent and capable, but I strongly believe she was the exception rather than the rule.
(Darth Foxtrot A one-man army dedicated to making fetch happen, Wed 11 May 2011, 9:50, Reply)