That’s why you focus resources on protecting those who you don’t want kids to spread it to, the sick and the elderly, a la the suppressed Great Barrington Declaration.

It wasn't 'suppressed'; it was announced to wide acclaim, others took issue with its premises, and there were significantly more of the latter than the former. There was considerable skepticism of the sponsorship of the libtertarian AEIR, and the fact that hundreds of thousands of people had already died in the US by the time of its publication probably had a lot to do with its lack of popularity.

Or uh, we could stop the virus in its tracks and go back to normal? This was the New Zealand plan, and it worked.