Unfortunately some people want to ruin things for everyone.
Seriously,
"More than 820 million people are hungry globally"
"https://www.who.int/news-room/detail/15-07-2019-world-hunger...
820 million people on this earth were hungry in 2019.
When you are hungry, really hungry, which is not something most people in the western world know about, and also have only limited dirty water supply, then you have other problems, than a new disease, all the rich, old people are scared about.
So no, it is not at all realistic, to have the world in its current state, in effective lock-down, without causing more harm, than good. Unless you don't care about the poor in the first place.
The vaccines on trial and in research, may not work.
Containment does work. Isolate the sick. Lock down for 4 weeks. Face masks everywhere. Keep socially distant. Avoid indoor settings.
Get groceries delivered, or have an employee inside do the shopping and packaging, and you pick up the order outside.
These are hard choices, but it can effectively kill this virus in 4 weeks. It’s not rocket science anymore.