Most people think what they do at work is important for them on a personal level. This may not be an objectively correct belief (but then, how does one define what's objectively important for oneself?) but there is this sentiment of wanting to make society better, and at work you are in a kind of society.

You seem to be missing that social link with your coworkers.

(And yes, if you ask me, I'd say it's everybody else that is crazy here, not you. But people are not built to have a completely clear mind.)