Imo only the individual can decide for themselves if they feel fulfilled. Blanket statements saying every is fulfilled or no one can be fulfilled seem out of place to me. Op seems to be saying one "can" feel fulfilled and I also read that as it's possible to feel fulfilled. I think this is a healthy outlook. If someone doesn't feel that way that's fine, and I don't think anyone would say every is going to feel great all the time I think we all know that's not true. But there is an opportunity for fulfillment. People can feel different things and have different ways of feeling fulfillment.