My rule of thumb is that the more people who are educated on a topic agree on something, the less likely it is they're wrong. It happens, but not very often. A

My rule of thumb is that the more people who are educated on a topic agree on something, the less likely it is they're wrong. It happens, but not very often. Additionally, it would be very surprising to learn that lockdowns are ineffective given that covid spreads via human-to-human interaction, and lockdowns enforce a reduction in those interactions. So, while I believe it's not impossible you are right, I would be very surprised.