You've heard of this pandemic thing going on though, right? Perhaps they should have not put an age restriction on.
If you want people to follow rules, you have to be consistent in how those rules are applied.
Yes, we should.
> increase mortality by requiring proportionally more at-risk people to get sick to reach herd immunity.
This assumes that herd immunity is reached without a vaccine; the whole idea of controlling the spread is to reduce the degree to which herd immunity depends on people getting infected.