Sure, but the problem here was explicitly not the individuals occupying the apartments being seen.
>Unless I'm missing context the museum didn't organize tour groups to specially look into the apartments
From the court ruling: "Visitors in the viewing gallery frequently look into the claimants' flats and take photographs, and less frequently view the claimants and their flats with binoculars."
"Photographs of the flats are posted on social media by visitors. On the platform Instagram there were 124 posts in the period between June 2016 and April 2018"
I do not think it's acceptable to subject anyone to this, be they rich or poor.