If you have to compete in a Leotard then working out in one everyday will make you completely comfortable in it. The last thing I want is a child getting ready to salute the judge and thinking about how they look, instead of what they need to do. That is why some coaches (including our gym) want kids in Leotards on a daily basis. Obviously if its cold out we let them wear body armor shirts/ pants,, but being in Southern CA..... well.... it was 91 here yesterday!
And yes our teens wear Leo's every day, no shorts, no problems = a strong mind at meets.