No, he's saying the government should get out of deciding what to build and make it legal to build so that people build more housing, of any type, period. "Just buy a house outside of an urban core" is only possible if such housing exists.

There are reasons to have some kind of building rules. Noice, smell and shade are valid reasons to limit certain types of buildings (or activities within those buildings).

No, I'm saying that the assumption shouldn't be that everyone wants to live in an urban core, that everyone should live in one, or that it is righteous to advocate for everyone to do so.

Specifically, most government planners seem to assume increased density is a universal good, which is not the case in reality, so I'm saying that those planners should not compel everyone to live in a dense urban core.

Has anyone ever assumed that all people want to live in urban cores? However, current planning in the US seems to assume that most people want to live in car dependent suburbs.