For both vaccinated and unvaccinated, the risk of becoming ill is less than 1% in these trials, which tend to test persons 18 - 55 or young for 2 weeks to 2 months. So the 'efficacy' numbers are only valid for that duration. After the trial ends, people continue to get sick and the 'efficacy' rate decreases.
As long as the FDA, CDC, NIH, and Fauci lie about these vaccines, there's no reason to trust anyone promoting them.