The reality seems to be much more like long term disease side effects are relatively common, extremely difficult to diagnose, and just starting to be understood.
For example there have been recent publications indicating the Epstein-Barr virus (EBV, often called "mono") is a cause or potentiator of multiple sclerosis.
We also have "chronic fatigue syndrome" and "fibromyalgia" which are essentially just clusters of symptoms with no known definitive cause which are quite possibly "Long-<disease X>" among others.
You're also neglecting the long term psychological and other effects of lockdowns.
It is not clear that the benefits of forced lockdowns or forced vaccinations beat the alternatives or that such things are justifiable in a free society... and if you want to live in a dystopian society that matches your morality I suggest you move to one.
As for me the cost/benefit of lockdowns has become clear to me and I'll vote with my feet if faced with another one.
Imagine each wave of new Covid variant leaving a percentage of the population a little less strong, with a little more brain fog... that's a way more frightening gradual descent than the inconvenience of a periodic total lockdown.
I don't think perfection is possible, but I also don't think that living with regular exposure is going to work out very well for us. The biggest thing I fear is that we end up with a weakened and lower IQ population while countries like China that do their best to limit exposure will stay stronger overall because they are willing to work with a periodic lockdown. Lockdown supply chain problems can be solved a lot more easily than widespread heart, lung, and brain damage.