Here in Austria, most leeches, sorry, realtors, avoid putting the street in the ad to prevent you from trying to contact the property directly and bypassing their fees, so apartment hunting is even more of a headache.
Still, amazing work from OP.
Similarly, in the city where I studied for university, I immediately knew where the house was located just from outside pictures of it in the ad, at least for the districts of the city I was familiar with.
In places like The Netherlands, a seller generally works with one seller's agent only, and there's no incentive to hide full addresses. Funda.nl has a huge amount of detail, from high quality photos, to floor plans.
On the contrary, in Singapore, a seller often has multiple agents. The agents compete with each other and would rather not share any information at all publicly to avoid other agents using their information/photos, or buyer's bypassing them. It leads to propertyguru.com.sg with no addresses, bad photos, all photos watermarked with the agent pictures. As little information as possible, just enough to draw you into an in-person visit.
I guess the variety of concerns will vary from country to country depending on local laws / existing open data though.
The owner doesn't really have a reason to care, I don't think, and may even be incentivized in some situations to reveal information the tenants would rather they not.
Goodness. I should give the First Amendment a hug.
In most places renters are only granted 24 hours notice to have complete strangers come walk through their living spaces while the space is shown off. They have no real right to refuse to allow that.
If people start knocking on their door asking to come look at the place they are free to refuse, or ignore the doorbell or anything else. Of course they have a freedom against being harassed, so if people persist they can get police involved. That seems like a separate issue to me from having their address posted online in a rental listing.
In some EU countries they do. The landlord need to ask permission to have visitors at your place and the tenant has the right to refuse.
Are you sure the tenant isn't just allowed to refuse "a time slot" but also must offer alternatives?
Story time: A couple of years ago, I was looking to buy an apartment and saw one spacious apartment centrally located that was way below market price but had no pictures in the ad. I called the agent and asked when can I visit as soon as possible since there's no pictures. Agent said the old lady currently renting it does not allow visitors inside, that's why there's no pictures. I asked how in the world can you buy an apartment without seeing it? Agent said that's why the owner is selling it below market price. And the charry on top, if you do buy it, you'll be forced by law to keep the current tenant who's paying frozen rent, not adjusted for the past 20 years, until she either decides to levees voluntarily or dies. That's why the owner had to sell below market.
someone being this hostile about it is rare but it sometimes happening is a necessary consequence of these rights.
anyway though in most places our protections are not this extreme. you can refuse a specific visit but have to provide a time when they can come later.