Well, dunno if I should explain my reasoning but here goes...
For the same reason I never got a rabies vaccine until having to work in close proximity with rabid animals. Up until that point, my chances of dying from rabies were pretty slim to none.
Likewise, my chances of severe complications, death, or even experiencing any symptoms at all are slim to none. The at risk people around me will be likely vaccinated, so i'm not putting them at risk.
Now, the rabies vaccine came with some known risk, a bit higher than others, hence why it's only given to people who request it or need it.
This covid vaccine is brand new, rushed, the manufacturers are legally exempt from liability for damages the vaccines cause most places in the world and it's a mostly new technology not really tested or used before.
There are potential side effects, these side effects are potentially long term and severely debilitating and despite being a low risk, it's still a higher risk for me than experiencing anything terrible from covid.
So, why put myself at some unknown risk from some unknown thing over something that, is more than likely not, going to cause me severe problems?