Imagine property tax is 0. Why would anyone ever sell? All the land would effectively be owned by hereditary feudal lords.
Texas has higher property taxes than California but more affordable housing. Makes you think.
You'd sell for the usual reason, i.e. you'd prefer having money rather than that particular piece of land? That money would be then spent on either consumption or an investment with higher yield than land-holding.
In my home country Poland the land tax is negligible and yet the market for land exists, it's not held forever by "feudal lords".
I suspect if you pick apart of the BA housing market you'll see some very large landlords with huge property portfolios. While they're not literally "feudal lords" they might as well be in terms of their self-serving influence on housing policy.
Perhaps not coincidentally, some of them are FAANGs.
https://www.mercurynews.com/2019/11/03/meet-silicon-valleys-...
Whether or not you think efficient land use is a good thing is up to you. The question of what taxes accomplish is separate from the question of if a policy objective is "good".