Sure, nothing wrong with that, if they want to be technique collectors. Of course, like I told Zenjael, who seems to also be a technique collector, its not the techs that matter. People can know a million techs. but if they dont understand them, if they can't make them work, then whats the use?
Out of curiosity, you seem to be a big defender of at home training. You don't use this method do you? As for your last paragraph....I too, worked a 4p-12a shift, and yes, it sucked. Really cut into my training time. To further mess things up, my days off changed every 3 weeks, so I always had to work around that. Fortunately, my teachers were accomodating to me and of course, I was greatful. I was training long before I met my wife, and of course, shared with her, what I do, and she always has been supportive of that. Of course, likewise, I arranged my training, so that we were able to spend time. No, I'm sure she wouldn't like me being gone all the time either..lol.
But still, despite my crazy schedule, I never resorted to dvds. I'd rather do a 1 on 1 private lesson and pay extra for that, in the event I couldn't make it to class. I'm fortunate....1 of my teachers, who I train privately with, is very close by, so I do try to train with him a few times a month. The dojo that I attend on a regular basis is close by as well. I'm there 3-4 times a week, for a 1hr class. This hasn't hindered my home life at all.
In the end, I suppose it all comes down to what people want. Some are more serious about training than others. If people want to use a dvd, then fine, it is what it is. Their training will be limited to the content of the dvd only. If people are lucky to train at a dojo, then thats great too. I do think alot of times though, people are looking for the easy way. Instead of making a sacrifice, they take a shortcut. But again, it is what it is.