Are there any serious objections to that line of reasoning?
There are different kinds of homeowners. There are those who are flipping houses and directly betting that the values go up, which is the crowd that you're describing. But at least in my area of the world, the majority of the anti-housing crowd is just old and is more anti-change than anything else. Even if the value of their home skyrockets even more, they won't sell and move. Their complaints are more about noise, traffic, and "quality of life" than home values.
There are strong factors around character of a neighbourhood: I think people in valuable SFHs tend to resent people in units as one example. Housing prices have typically risen without the assistance of zoning changes.
Better to not get into that mess to begin with. Strongtowns is a great resource for cities looking to be prudent financially.
In most places they are not. What would even compel you to write something like this?
Property values are regularly re-assessed according to recent sales and a % of the property value is then levied as tax.
For example, in Vancouver the residential tax rate is around 0.15% and homes average around $2 million. Where I live which is a few hundred kilometres away the residential tax rate is around 0.5% and homes average around $600k. If you do the math, for both places the average place has $3000/year in taxes due — which is totally independent of house costs.
What does make the difference is if your house is more expensive than the average house. If you have a $2million dollar house in the place with 0.5% tax rate you are paying $10000/year in taxes despite your counterpart in Vancouver with a $2million dollar house is paying $3000/year.
I get this can be different across the world, but that is generally how it works in Canada.