It may turn you from a low to mid-level performer in Primary into a better one in the early stages. This will in turn improve your odds of getting your preference of advanced platform. If you are a bit of a slow learner it may save you from failing a flight prior to your first solo flight. That’s about it. Unless you were a commercial pilot or CFI prior to flight school it isn’t going to be a huge deal.
Isn't the conventional wisdom that it can just easily lead to bad habits or a false sense of security leading to early complacency/overconfidence such that when compared with the costs it should only be done out of pure passion and/or as part of formal education program ala embry riddle?