People only love celebrities because they live vicariously through them. When one of the those scumbag Kardashian daughters posts a photo with a new pair of sneakers, half a million idiot women following her instagram feed comment on it, telling her how beautiful it looks and how well she wears them. Would they do that if their neighbor or sister wore them? No. Those people are nobodies, like the person leaving the (generally unreplied to) comment. They want to be somebody. But they can't, because they're talentless morons with no connections, luck, or money to live like the celebrity in question. So they live through them and it makes their miserable, unproductive lives whose one hallmark is inertia-related boredom slightly more tolerable, as wearing that same pair of shoes makes them feel important and special through the (non-existent) connection they have with that same celebrity.
Cops, military people, firefighters - they don't want your worship/admiration. As one guy in the navy (now former) once told me, "When we enlist, we're just basically telling people back home - take it easy, we've got this. Just go about your lives and let us do our jobs." That's all there is to it. They're not more special or important than anyone else, though you could say they're more brave, on average, because of the nature of their jobs. But that's about it. Otherwise they're just like you and me, and the irony is the same could be said of those celebrities, which is why they sound and look so bland and average when TMZ catches them off guard leaving some high-priced sushi bar in WeHo.