Dr Lee's first point seems to be a matter of perspective. If the worst flu death toll per year is estimated to be 30,000, and we have already exceeded that in barely two months, I'm not sure that I can agree with the idea that it's really "in the same ball park". The rises in all-cause mortality, driven heavily by Covid-19, are remarkable. In some places, such as New York, the effective death rate has gone up by at least 300%, and while it may turn out to be a short-term spike it's simply not credible to expect governments not to react to that. Nor is it clear that all those who were dying were "approaching the end of their lives", which is vague enough that it handily can't be challenged. If at the end of the year we see several weeks of lower than average deaths then, sure, I'll turn out to have been wrong and thank goodness, but for the moment I don't think there's any evidence to support his claim on that point. Or at least we'll have to wait until next year.
Ditto point 4, which strikes me as almost grasping for a measure that supports his point; certainly, any measure of QALY will be far more difficult than other statistics, so it will be tricky to evaluate one way or another.
Point 6 suffers because it's clearly a made-up number. We can assume 50,000 deaths equates to a 1/200 chance of death only if everybody over 65 catches Covid by the end of the pandemic, which is unlikely, although not impossible. As far as I'm aware the evidence tends to suggest that if indeed everybody over 65 caught this then a 1/200 death rate is probably, sadly, wild optimism.
Point 7 is a matter of perspective again. For my part if the sacrifices I'm making help save any lives then they are well worth it. Isn't that what community spirit is about? People change their habits in response to a crisis, it's what we are good at.
To be sure, the scientific understanding is constantly evolving, and so in that sense I completely agree with the sentiments in Dr Lee's final passages: "following the science" can and absolutely does mean changing course as appropriate, and, when necessary, admitting that the old approach was wrong, however well-intentioned.