Exactly Maizie! Your feelings about it are nuanced. It' a pragmatic decision, not based on what would be best from a scientific perspective. It's a compromise, but some people seem to think they have a right to do something they want to do, while others don't have that right.
I really hate the divisive blame games which have emerged from this situation.
There is one school of thought, perpetuated by certain professors at Oxford Uni, that the younger generation has a "duty" to carry on and infect each other to achieve "herd immunity". That is a discredited theory because no infectious disease has ever been eradicated by herd immunity without a vaccine, but by public health management. It's also highly questionable morally because younger people have died or suffered long-term ill health.
Therefore, the messaging us all very confused. On the one hand, younger people are told it is safe for them to mix. In fact, they're told to eat out, go back to work in the office and, if they're very young, to go back to school/college. On the other hand, they find themselves more restricted than the people they're being told to protect.