> Maybe in February of 2021 that was a concern, but by February 2022, there's so much vaccine in so many people that this particular concern is just laughable.

The concern has never been that the vaccine has been tested in too few people. It's that it hasn't been tested for long enough. You can't make up for the rushed process with more test subjects, just like when baking, you can't halve the time by doubling the oven temperature.