I'm interested, however, in your thoughts on the second and third order effects of school and economic shutdowns? One article I read recently suggested there will be an additional 500k deaths in India due to TB because lockdowns are preventing people from getting treatment. An additional 10k children will starve to death worldwide per month due to second and third order effects from people not buying/using regular old crap from the store. We've also seen suicides and drug overdoses skyrocket in the United States. There's a lot going on and there appear to only be bad options on the table. Are there other things you're aware of, that you're taking into consideration?
2. There is no other option. You quarantine, or you don't. It's a binary thing. If you don't quarantine, you continue to spread the virus and prolong the issues.
I don't know why you're talking about TB
Your 'not so bad' doesn't cover the real potential costs.
If it was observed that, for instance, dogs were a transmission vector of COVID-19 but rarely suffered severe effects, it would be critically important to shut down all the dog parks. Not to protect the dogs, or even the dog owners (in my very limited experience the people who tend to take their dogs to dog parks tend to be younger) but simply to curtail the spread of the disease.
If the schools are open, COVID will be rampant in the larger population, even if few kids are getting seriously ill.
However, there is also evidence of organ damage and anosmia among those who recover.