I just remembered this thread, when I came to think about the topic of WFB Pistoliers being a proving ground for young nobles aiming for a military career, and whether it makes sense.
Perhaps it does, when considering the operational use of light cavalry. Such troops would spend much of a campaign as outriders, scouting for and screening the main body of the army. That would more likely than not make them see constant low-intensity action against similar enemy troops. Action that, particularly, would serve to develop situational awareness. Which might make it a particularly efficient, even if dangerous, way to accumulate the kind of experience that would be useful for a military officer. A knight, though, not so much.