This might work. But how many people will die in the process? There are many cases of young people, with seemingly no prior health issues, dying after getting severe issues as a result of the virus.
On top of that, you can't guarantee that young people will only get it. With no travel restrictions, it can easily spread to the elderly.
On top of that, you can't guarantee that young people will only get it. With no travel restrictions, it can easily spread to the elderly.