Undeniable there are a lot of people who train jiu-jitsu all the time, and not only do they do maybe 5 or more jiu-jitsu sessions a week but they do strength & conditioning work and maybe cross-train in judo or wrestling as well. This is great and I love that jiu-jitsu means so much to so many people that they want to train this much, but it does lead to some people thinking that anything less than this level of commitment is worthless. I couldn't disagree more.
I think people should train as much or as little as they want. For some people it's a massive part of their life and they want to compete, win medals and progress quickly. But many people just do it because they enjoy it and it keeps them fit and healthy. Maybe they just train once or twice a week, that doesn't mean they should be seen as less committed or less a part of the team, they just have different circumstances, different reasons for training or different goals.
People talk about "jiu-jitsu lifestyle" (and really, I'm not even sure what that is meant to mean) but need to realise some people don't care about doing stuff to help their jiu-jitsu. Lots of people are happy training once a week, or even less frequently, and that's fine by me. I think everyone should be made to feel at home in the academy, no matter how rarely I see them. Not everyone is young with plenty of free time to train, plenty of people who love jiu-jitsu also work long hours, have a family and already have other commitments (taking kids to do activities is a common one which I know stops a lot of people training more)... I would hate for people like this to feel they are less important to an academy, or worse that they are a hindrance, just because they don't train a lot.
So yes, jiu-jitsu can be just a casual hobby for many people, even if it's a major part of a lot of people's lives. Some see it as a sport, some as a martial art, some just as a fun way to keep in shape... however people look at jiu-jitsu, I think they should all be welcome into an academy.