The tax base you have per meter of sprawling single family infra doesn't even necessarily cover the maintenance. https://www.strongtowns.org/journal/2024/4/1/heres-the-real-...

And "build moar housing" trivially entails "and the infra to go with it". You're making the opposite mistake by assuming that the solution we already have is somehow better and more affordable only by the virtue that we currently have it which would only make sense if there was no maintenance needed.