I think one demographic is always going to be more adversely affected than another. However it's not as simple as favouring one over another.
The reality is unless you actually talking sacrificing group of people (which is al while different conversation) then we are trying to preserve everyone. The death rate is low because overall we can cope with this illness, but if the disease spreads further through the population then hospitals will struggle to keep up with demand. This time of year hospitals are usually under demand and short on beds from seasonal flu and other diseases, we add Covid to the mix then hospitals are very likely to quickly be overwhelmed.
The solution to stop that is to to try and control the rate of infection in the population so that hospitals can keep up with demand OR we literally decide that certain people are not worth saving, Covid or not and leave them at home to die. Forget your perspective of what Covid is, even if it's a mild flu that people shout about it being, adding another disease into the mix is likely to overwhelmed services, it's very common to for hospitals to close to admissions in certain areas during the winter, the reality is the NHS struggles with winter frequently but adding another disease to the mix increases that pressure. So unless you want to go paint red marks on the doors of patients who are deemed not worth saving then the reality is we need to try and be responsible and not spread the disease.
The reason we don't want the service overwhelmed is that if it becomes that hospitals can only deal with emergencies then all other services will be put on the back burner. Your child breaks their arm at night but A&E is only open 9-5, you are pregnant but maternity has closed, you find a breast lump but cancer services and radiology are shut. Which seems impossible but could be a real reality. I have been referred via a 2 week referral for suspect gynaecological cancer, it may not be, but my liver enzymes are out of whack, I have blood in my urine and pain in other places, I have no waited 8 weeks thus far and my appointment has been cancelled, I'm told I may not be seen this year. I may just have fibroids, in fact that's the most likely, even with a range of conflicting symptoms, but I may be dead before I'm seen. More people will die of non Covid related diseases regardless of the severity of the disease, but introducing a new disease into the population will adversely affect hospital services.
There is also the fact that, at least in my area, we have year groups constantly shutting, businesses closing under the months of strain, we aren't allowed to leave the area, holidays are affected, entire businesses close because the disease spread through the workforce.
I agree that children and young people are having a raw deal, but I think it's horrific to allow suggest that we don't treat those with existing conditions, or who are older, or who are obese, or who smoke, or who are pregnant based on those being the people who are at greater risk.
It's not even about a group of people, like I say, it's about not having business wide shut downs and not having hospitals having to shut.
I don't think any of us are unaffected by this, no matter our age.