The public policy responses to this pandemic would make a whole lot more sense if intramuscular (humoral) vaccination actually prevented (or even significantly mitigated) the spread of sars-cov-2. Unfortunately humoral vaccination only starts the B cell to plasma cells training and generation of igG antibodies in the body serum to protect internal organs. Other immune compartments like the upper respiratory mucosa ar…
Covid vaccines did do a decent job at preventing spread in the original variants, and actually even now (unless I'm mistaken, it's hard to entirely keep up) the vaccines still cut the probability of you being infected at any point in time
Edit to add [I'm rate limited from commenting further for the time being]: Look into the Great Barrington Declaration for reference to evidence for "you're more likely to catch COVID if vaccinated."