>On average, people that get vaccinated will be exposed to much, much, much less spike protein than those that get infected
Except unlike a natural infection with a gradual ramp up, the vaccine is effectively an immediate megadose of an inflammatory and apparently potentially mutagenic protein. Blindly presuming that the vaccine is preferable to natural immunity from infection is, frankly, dangerous.
In addition, during the course of a natural infection, your cells are producing the full, assembled virus from the full viral genome. With the vaccine your cells are producing a single inflammatory protein which then embeds itself in the surfaces of your own cells, producing an autoimmune response in effect. Given the hysteresis of the human immune system there is a nonzero risk of semipermanent to permanent autoimmune effects/disorders. And obviously a side effect like a subtle autoimmune disorder would be extremely difficult to detect in such a short time scale, doubly so if clinicians and researchers are not actively looking for evidence. Just diagnosing known autoimmune disorders can take years...and there's no guarantee that such a side effect would manifest in the near term.
Two years in and the danger of COVID in healthy people, as in complication rate, has clearly been overstated. Ask yourself, if it weren't for news reports, would you even be aware from your day to day life that we are still in the midst of a pandemic? If the answer is no, then mandating an experimental vaccine, based on an untested technology, for what amounts to a bad flu, is unjustifiable.
Edit: and on top of all that, considering that the vast majority of cases are asymptomatic or mild, there's no reason to suspect that the total exposure of someone who builds natural immunity will produce a comparable exposure to spike proteins. Not to mention the assertion that everyone eventually will be exposed is also unfounded, and likely does not apply to rural populations.