Sure, but that's also a relatively superficial way to look at it. Whatever someone like this is doing, clearly they get something out of it - if you can find out what that is then it may be telling about what's going on in their mind. In the case of yoga (hatha I assume) it clearly has something to do with the body. Aside from forms you got maybe a little bit of breathwork at the end then hollaring OM a few times, but that is about it. People go for the health benefits, you're not going to see very many of them studying the yoga sutras or anything.
But my point is there may be something deeper going on. On some level maybe they're just not satisfied, and even though they're not really getting what they want out of this kind of a la carte approach it may serve to exhaust things, and at some point they may come to realize it's not about any of it. Or one of those things may be interesting enough that they make enough of an effort and it loosens up the foundation structure enough for things to start really happening, that's basically what happened with me. Even without sticking closely to a program (or because of it?) being in a largely silent environment (meditation retreat) for a month opened things up quite a bit, and I didn't become a Buddhist.