Earlier quoted context omitted.
Please elaborate how are lockdowns not a solution to stop the spread of a pandemic, because they most certainly are, and stopped every country's health system to get to the terrible state Italy's got at the beginning. It's actually quite easy - the virus is airborne. If most people stay indoors and don't meet other people, the spread is significantly stopped.
1. You’re overoptimizing for Covid, and not for health, 2. The adverse effects of mental and physical heath are irreversible, 3. The tanking of the economy and the debt (until 2048 for France) is irreversible, 4. You didn’t even solve Covid.
However, the question is do lockdowns help against a pandemic? I don't see how anyone can argue with that. The downsides are indeed significant and need to be taken into account, but it's just a fact that lockdowns severely limit the spread of an airborne virus like COVID-19.