In general, I disagree with you. I think the two things you fixated on (souless architecture and rentals) are bad approaches to density, but you will notice that for the most part, this is the form of “density” that places who are notoriously bad at density do. Its what happens when we deliberately regulate ourselves into not allowing other options.
There is a pretty crazy amount of “density” in well bit, low rise structures - though actually I dont personally hate on towers as a concept.
Also, i would like to highlight that a very small portion of people are living in newly built homes, and only a small portion are really able to make meaningful design impact. Most just buy the builder-grade suburban model home. The idea that suburban single family homes are some design panacae is just wrong.
That diet doctor recommendation feels wildly high for a “what is actually necessary” request. Like 2 g/kg is near the target for bodybuilders.
It might be a good idea for many people to hit that to maximize muscle development in preparation for aging (where muscle deterioration is chief concern), but not a good estimate for anyone who isnt worried about that.
They also say two further things which ding their credibility:
First is this comment: “Because there appears to be a limited amount of protein that can be absorbed at a meal, it may be best to evenly space out your protein throughout the day, if possible.”
This is not really a concern even for bodybuilders. You dont need to overthink spacing.
Second is the comment about vegetarians/vegans. Protein intake is not a huge concern for the average vegetarian, if you are not aiming for that unnecessarily high target - as long as they are regularly including some protein in their meals (soy, beans, nuts, eggs). Even for non-vegetarians, that higher target requires you to monitor of your protein intake to hit it regularly with overeating.