Not being allowed to go to the gym.
Not being allowed to go outside.
Not being allowed to see family.
Not being allowed to see family when they're dying.
Being cooped up inside with your immediate family when you usually have some amount of time apart.
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Every animal ever studied fails to thrive when placed in captivity. The human subject experiments from 2020-2021 were unconscionable.
None of your other points, regrettable, discomforting and painful though they were, could have caused that surge in excess deaths.
I get that you hated the lockdowns. I’d argue most people did, but that doesn’t preclude the fact that many of the people that hated them also accepted their ‘necessity’. I put that in quotes because the necessity itself may be arguable, but the fact that many people were convinced they were necessary is not.
Whether they were the right policy call or not, it's clear that drastic environment changes had drastic behavioral effects, and that the behavioral effects either provably did have, or, based on all available scientific data, probably could have had a regrettable impact on excess deaths.
As societies across the globe engage in introspection on COVID response, it's worth further research and factoring the results into their conclusions.
If anything, what this would imply is that we haven't seen yet the completion of excess deaths related to this era. But proving it will become increasingly more difficult as the long-tail blends into the noise.