That seems to be a completely artificial problem of the modern corporate first-world that discards or isolates anyone it doesn't find useful (the elderly and children) when, for a most of history; the elderly never stopped working in a meaningful capacity ever until they dropped or were incapacitated; children were working with their guardians much much more of the time without dipping into exploitative child labor of industrialism.
> But there are meaningful jobs out there and working together can be an important part of a fulfilling life.
It's like we're making the best of having our village raided for resources and saying some of the raiders don't take all the stuff (and they don't take nothing). What we need are appropriate walls so that our relationship with these outsiders can be one of trade/negotiation.
At a base level, everyone wants a meaningful, fulfilled life. A key component of that is having enough autonomy and control to feel that your decisions matter because they are your decisions. But another important component is to feel that your decisions matter because they matter to others. We are a social primate species and for most of us, our emotional systems are wired to feel the greatest peace when we feel we are helping our tribe and being supported by it in return.
Being part of a group (job or not) where you feel your efforts help not just you but the entire group is deeply important for most people. There's a reason that male suicide rates skyrocket not long after retirement. We are not happy alone and disconnected, even though being in that state in theory maximizes our personal autonomy.
Obviously, this is not to imply that a job is the only or best way to find that kind of tribe or group identity. But there are meaningful jobs out there and working together can be an important part of a fulfilling life.