[BenFranklin100]

The argument is not so much flawed as it is morally reprehensible. The phrase ‘Maintaining the character of the neighborhood” is historically a racist dog whistle used by Whites wanting to keep out Blacks. For background of the historical intent of zoning practices, see “The Color of Law”:

https://en.wikipedia.org/wiki/The_Color_of_Law

You can also read more the 1920’s SCOTUS case ‘Euclid vs Ambler’ where the justices agreed that apartment dwellers were essentially a public nuisance and thus apartments could be regulated.

Nowadays it’s not so much skin color, but rather social class or the ‘wrong’ sort of minority that people want to keep out. Whatever the reason, the type of restrictive zoning the OP is advocating for has major repercussions for equality by restricting access to well paying jobs and other amenities like hospitals and schools.