bowhack,

You're right, you don't NEED to know anything about VM or lots of other very technical aspects of archery to shoot some deer. But some tech-heads of archery DO like to delve into these topics. Knowledge is power.

Without people wanting to know more, experimenting with new ideas, or getting into the nit-picky details of archery, you wouldn't have the "hybrid cams" of today, fancy riser designs, carbon arrows, aluminum arrows, or even a compound bow to begin with. Heck, if it wasn't for some creative caveman that thought of launching a smaller version of a spear by pulling back on a branch with some string tied to both ends, we might be still throwing rocks at deer....