Well ... someone does have to think the ugly thoughts. That's what triage is all about; making a measured difficult decision and confronting ugly truths when you do so.
Governments do this kind of math all the time, especially in military matters. The poster has a point, and yes, it's ugly, but it does need to be addressed: if slowing down the pandemic causes major world-wide economic hardship (think the crash of 2008 x10 or so) or, even more seriously, causes nations to fall, was the societal price to save those lives too high?
All human lives have value, of course, but preserving every life at any cost is usually not a sustainable practice in times of widespread disaster. It is not realistic to expect a society to always choose to do it, because history has proven that they usually cannot.