Pavan,
I concur with your assessment. I'm also a classical musician as a hobbyist...I love my viola. The analogies are similar. It amuses me when I think that I can grip a viola neck and handle the bow any way I want, and it will play music...and that's ok because it's me, it's my style... However, if I want to play it well, it behooves me to pay attention to how it should be handled as taught by the masters. I believe it is the same with the Hill style longbow. As in other types of bows, look to the masters of the weapon to learn how to shoot them the best, to get the best out of that instrument. If I was shooting a Yumi style Japanese bow, I'd look for instruction from someone well versed in that bow. The same reasoning should apply to the Hill style longbow... even though it can be shot any old way, according to the shooters personal style. Do you want to get the best out of the bow?...shoot it with the best method devised for it....
I've noticed that the majority of people who say to me in print or on the phone that they can shoot the Hill style bow however they want, and they don't believe it matters or they don't want to change their form to fit the Hill-style bow...these people don't shoot this style bow well, they go through Hill style bows like water, and always go back to their other bows whatever style of bow that may be. And that is ok with me. Shoot whatever bow is the most comfortable to you, whatever style of bow fits your physique, personal makeup, likes, whatever...be it a Yumi bow, Korean C bow, english longbow, selfbow, ILF recurve, R/D bows, or Hill style longbow....it's all good, but in their own unique way each shoots better if you shoot them with their nuances in mind....