Many good, serious Trad clerics (who see issues with the modern police state -- see COVID 2020) like to keep a low profile. Not just Bp. Z, but also Bishop Trinh. And I bet there are many others. And they really have a point. The government is *not* our friend, and they proved that for the world to see, just 4 years ago. How quickly everyone forgets.
My point: eliminating GOOD lifeboat chapels (who want to keep a low profile, stay "underground" or under the radar) would make the directory much less useful. I don't want or care to visit some Indult location. If I were seeking Masses away from home, I would want to get in touch with priests and bishops like Bp. Z and Bp. Trinh. If I can't do so, then I can't do so.
That makes sennse. There are others, however, that do not wish to keep it secret, and I think the target audience would be Traditional Catholics who are traveling but then want to find a Mass. I've been there myself, where I'd pull out the Traditio guide, but the problems I had were precisely what got me thinking about the new site ...
1) Often I was near state borders, where I could have gone in one of 2-3 states, so then the way it's organized, by state, I had to look in each state, and then I had no idea how far some of the cities in some of these states were. Basically I ended up plugging every one into Google Maps. "Ooops. That's on the far end of the state I'm near, 400 miles away." etc.
2) There were one or two times I showed up and there was no Mass at the time listed (doors were locked) ... and I had no idea why, except most likely the info was outdated.
3) Traditio didn't list Eastern Rite options, which for some of us are viable alternatives (though Maronite generally isn't for me unless I know of a priest being conservative up front)
4) Not knowing who the priests are (conditionally ordained or not?)
So those are the types of real-world struggles that fed into my thinking. But, yes, you're right ... some chapels want to stay below the radar. I definitely believe that the Plandemic 1.0 lockdown was just a dress rehearsal, and that the next one will be Draconian. If people think they didn't have access to the Sacraments, to churches, etc. during the first one, Plandemic 2.0 will probably make it nearly impossible.
I think it might be a good idea for some of the bishops to create secret/underground priests ... along the lines of what I'm sure that Bishop Slupski had in mind, as he lived under Communism and probably has a good idea of what our future holds.