> but I think the more interesting question is whether they truly are content.

That's a big rabbit hole right there. Ancient wisdom says that there's nothing in the material world which can give you true happiness/contentment/satisfaction. The world is transient and so is the happiness you get from it. Moksha/Nirvana/Samadhi is the only way to become truly happy, forever.

Weed invariably leads you to such questions. No wonder it's the gateway drug to spirituality.