In cases where people are not asymptomatic, the symptons are mild when the person is vaccinated correctly. Just pay attention to the death ratios by covid before the vaccine and after, and also the percentages of the population that vaccinated with 2 or 3 doses. Not only that, the amount of people that gets hospitalized by covid also is drastically reduced.
So no my friend, science has not been denied and you can still believe the vaccines.