Biden claimed that but he's an old man and not a virologist, Walensky claimed that but was quickly corrected by the CDC, Fauci never claimed that, Gates never claimed that.
The shots do provide protection shown by the proportion of unvaccinated people that are ending up in hospital compared to vaccinated.
The effectiveness has reduced over time, that's true but partly because there are new variants that the original vaccine wasn't designed for.
Booster shots have been shown to push the effectiveness back up.
It's a novel virus that is still being studied which is meanwhile mutating partly helped by the low level of vaccination in certain populations.
As usual you're wrong about 94% of the time...pretty similar to the vaccine effectiveness against the original COVID coincidentally.