I can just lie and say I've never been to a doctor to get ahead in line, but lying about your race is more difficult. That being said, I don't know if this was

I can just lie and say I've never been to a doctor to get ahead in line, but lying about your race is more difficult. That being said, I don't know if this was the actual reason for not considering prior medical history instead of racial proxies for such. Most rationing schemes aren't that particularly well thought-out. More likely what happened is that when this scheme was being figured out, someone mentioned racial disparities in healthcare, everyone else agreed that it was a good idea to consider that a risk factor, and that was that.