Jim
You raise an interesting point.
I have L2 and, for me at least, it was worth it. I have an interest in all things deer and stalking related, so a chance to increase my knowledge and expertise was not to be passed by. That's also why I took the BDS Deer Manager's course. I didn't need to do the Level 2, but I wanted to, which is why I would say there is a difference in uptake between L1 and L2. One is seen (often incorrectly) as compulsory, the other is purely voluntary.
As it happens, gaining my L2 also let me progress to being a retained stalker, meaning I can guide clients, and an AW, both of which let me put something back into the sport. I do have my own ground as well, albeit small, but that works for me as my job requires me to travel extensively, so having 1000's of acres of my own wouldn't be practical either.
So far as your comment on standards, the difference between L1 and L2 is perhaps more marked than you think. There are plenty of stalkers with L1 who are not ready for L2, as they simply lack the practice. That aside, L2 is not designed to be anything like the level of training of a veterinary - that's like comparing a knowledge of simple first aid to being a surgeon. Instead its meant to help you judge what is, and is not, suitable to go into the human food chain.
willie_gunn