Are you sure you aren't being facetious and pretending like you have not heard any mention of the numerous studies that show vaccinated people do not spread the virus in any significant percentage and how herd immunity works?
No, I haven't seen any of those studies and I have very little personal motivation to do so as I live in NZ and the only place I care to travel to is Australia - so no need to pretend or be facetious at all.
In fact, my first actual exposure to wearing a mask was less than 3 weeks ago when I traveled to Sydney. TBH, I don't know what the big fuss is about.