They have plenty of other reasons to support it. The people that don’t support it for the most part are the large scale landlords who are happy with the run up in rents.

Large scale landlords actually want to invest in more property. E.g. the apartment building I reside in was built only a few years ago by a publicly traded REIT.

It is nativist homeowners that oppose new building because it reduces home appreciation and brings traffic and ethnically different people to the neighborhood / city.