The reason behind the uniforms, in my opinion, is that from day one at the Flight Schools that you describe, you are treated as a proffessional pilot. This means that these organisations are run in such a fashion that makes the transition from Flight School to an Airline at the end of the course as simple as possible. The uniforms are part and parcel of this
I am looking forward to getting my uniform at Cabair.... I can impress the ladies!