I only have anecdotal evidence, but the vaccinated people I know sure are getting sick a lot, and they are young and healthy. COVID multiple times.
Just like (older) Biden, Fauci, HHS Secretary Becerra, and Justin Trudeau. They all had all their shots, and wore their double masks, and they still got COVID more than once. I really don't understand what more proof people could need.
A theory I had heard was that after you keep injecting yourself with stuff that makes your own body produce spike proteins (that's how the mRNA "vaccines" work), your body gets used to the spike being around. So you can't fight off real COVID, but you don't get really sick.
The real super-spreaders might actually be the vaccinated. They don't get sick and stay home like I did; they walk around spreading it.