The tetanus thing is really only a risk if you get soil from the earth into a cut and fail to wash it out promptly. A clean cut absent debris that could contain the bacteria is of no risk at all.

In the US there are about 30 cases per year, almost all of which have not been vaccinated

So the vaccine is not perfect in anycase, and is a blanket protection for a very very rare condition. About 10% of cases are serious enough to lead to death, but again one would expect that to apply to those with pre-existing complicating factors. The immune system deals with 90% of those cases that do occur.