Having turned up to UPT not owning a car (sold mine prior, wife was in an accident and the other was written off), I would highly recommend avoiding it if at all possible. Often the location you end up in...will have a pretty poor car market.
As far as that particular piece of advice, you will hear it more than once when you arrive at whatever base you arrive at. If you continue to question it, and the reasoning behind it, you are going to have a bad time. This thread should have stopped somewhere around post 6-9 when you had already made your decision. You continuing to antagonize, and not just shut the f*** up as suggested, will not serve you well if you make it a habit. You are going to be given feedback about everything you do, you are expected to say 'Yes Sir' and run with that advice, not debate whether it is valid. But sure, try it and see how much fun you have. Worked out great for one of the dudes in my class...