the problem is forcing people into a medical treatment (injection of a vaccine) which obviously has risks. This is unethical and illegal.
The vax doesn't prevent infection.
Wouldn't this mean 0% efficacy? Does any study show that?
Depends on what you mean by efficacy. It's recently taken on the meaning of "Protection against death and hospitalization" which is not necessarily related to infections. But yeah, UK data going back into last fall consistently shows that vaccinated people over 18 even have a higher case rate (cases / 100000), sometimes as much as 100% more, than unvaccinated.
You are not guaranteed to get COVID.
None of my friends or family have gotten it. Not one.
How would you know that? You aren't guaranteed to get COVID-19 (the symptomatic disease) but you're almost guaranteed to get infected by the SARS-CoV-2 virus. The majority of Americans already have been, and those that haven't yet will likely get it soon. Many infections are asymptomatic (particularly among the vaccinated) so patients don't necessarily even know whether they've been infected.