Pessimistic answer: it’s for developers and landlords
The real estate tax they are talking about here applies to the net gain when you sell a property. People price things for what value they want to get out of them (and what the buyer is willing to pay). If you have a 7% tax on profit from a home sale (or appartment building) theybwill be priced higher to make up for it. That cost will be put on the renter in the form of slightly higher rent to cover the owners mortgage or target return.
It's just going to get rolled into the mortgage and passed on in cost of rent. Even if it's not mortgage, the people (companies) rich enough to do that will increase the price to meet their target return.
I don't see the price elasticity being a limiting factor. Your looking at $70 a month more on a $1k rent or $140 on a $2k rent, maybe even less if they plan it keep the property for a long time. People are choosing more on location and quality. Not to mention all properties, given sufficient time, will be subject to the tax and there will be no competition with existing untaxed properties to keep prices low, assuming there's any pressure to keep the price low in the first place.
Wouldn’t this have a bigger impact on regular people selling their homes not being caught paying the tax?
Also stock sales are more easily "structured" to avoid this tax (sell half this year, half next year) whereas a house has to be sold as a "whole".
But when you think about housing and capital gains tax benefits at a federal level, specifically related to one's primary residence, I think it's reasonable to say that taxing real estate sales (or at least housing) is not very popular in like, a literal sense. Now obviously people don't usually go selling their home every two years, so it might not be frequently relevant.
I just feel that housing transactions are, I don't know, more in public consciousness, than like selling a mutual fund? That assertion is basically speculation though, i.e. people might more commonly identify more as home owners, than people with large amounts of equities etc.
And I guess part of that is mental, and part financial, in that it seems housing is more frequently the biggest piece of one's total picture than I would guess.
We can’t have people to hit the housing lottery pay a dime of those gains as taxes, can we?