Two points worth noting here. First is that the currently available seasonal influenza vaccines are nowhere near as effective as the COVID vaccines: their efficacy across all age groups is never better than 60-70%, for people over 50 usually is around 20-25%, and typically about 15% (or less) for those over 65 (these are CDC estimates, reviewable by year on its website). Second is that although the incidence of COVID infection in fully vaccinated individuals (in the UT study) was only 0.05%, the incidence in the unvaccinated was only 2.6%. So yes, an impressive 50-fold reduction, but this translates to about a 2% rate of vaccine "failure" (i.e., preventing infection), or a 2% rate of possible infection and spread from a fully vaccinated person; this is consistent with the clinical trials for both Moderna and Pfizer vaccines conducted prior to the EUA. NB: this is only of relevance if there is a large pool of unvaccinated, susceptible people to whom it might be spread; if the pool of susceptibles is small enough, random individuals might get infected and sick, but there will not be an epidemic.
Also, not all vaccines work well; as noted, flu vaccines are relatively poor performers, as is the original shingles vaccine (Zostrix) and the older, no longer available pertussis vaccine.
