Endemic is not a social condition that people "accept".
It means the virus is found at a baseline level without external inputs (wikipedia).
It means the virus is found at a baseline level without external inputs (wikipedia).
What you're suggesting is that people accept that the cost of avoiding COVID and "flattening the curve" isn't worth it, and that we just let the curve do its thing. Hopefully the result that it will either become endemic or extinct, but neither of those are certain.