As Simon says, it's handy if you want a lease that asks for DSC II. At least having the certificate will get you on the short list. More generally, it's a step on the road to be being a better stalker. Certainly that's how my Dad saw it when he told me to get my DSC I/II. He got his DSC I/II more than 60 years after he shot his first stag and at 88 he's still learning and still pursuing stags. One of the fascinating things about stalking is that there is always a little bit more to learn. I've been out with a number of folk off this Forum recently and each time I go out on a new piece of ground with a new stalker I learn a little. Even meeting some of the folk at events like the Stalking Fair, you realise how little you know and what a wealth of expertise there is out there.
Doing DSC II is just one way of meeting folk and learning a little more about stalking, but the meeting folk and learning should never stop.
Best regards JCS