I asked the author of WalkersGuide (https://www.walkersguide.org/), an OSM-based navigation app for the blind/visually impaired. He is from Dresden, knows these situations and recommends using tactile_paving=primitive.

His explanation is:
On the one hand, the sett surface indicates that there is a crossing here. On the other hand, the use of "no" would be confusing if paving stones suddenly appear which local people can identify as tactile guidelines.

Of course, there is a certain bias here as a Dresden resident if you are familiar with these conditions. For visitors from different areas, this might be a little unexpected, but on the other hand, "primitive" is perhaps enough to indicate that a special situation is to be expected here.

Therefore I changed the value here from "no" to "primitive."

I just wanted to pass that on as information.