This is kind of another topic, but here’s my .02.
You’re right, it’s probably not the end of the world. Neither are disposable cups or plastic bags. But I think fundamentally the idea of separate capsules, while convenient, is wasteful and doesn’t inspire much of a recycling attitude. People buy these machines because they are indolent and desire convenience. I agree it’s not a big deal to recycle them as you describe, but most will find it too much of an inconvenience and they will not bother.
From a convenience point of view, Nespresso machines are way superior than traditional machines. But regardless of my reasoning, until they figure out a way to make the whole thing biodegradable, it’s still pretty great I can choose not to buy one.