Vaccinations are most effective if we reach herd immunity, which requires others to get vaccinated. The safety is not “perceived”, it’s scientifically verified by tracking hospitalization and death rates as it’s been rolled out at a global scale. The reason herd immunity is so important is that those that are immunocompromised _cannot_ safely get a vaccination and thus rely on there being enough vaccinated individuals to reduce the chance of catching it. Further, by many choosing to remain unvaccinated and allowing the virus to continue evolving we greatly increase risk it mutates into something the current vaccine cannot prevent.