I’d guess that you haven’t been in very many? (halls)
They are built kind of like schools that I went to.
Windows are usually rectangular, running around the top of the walls.
Like schools, they help to avoid distractions.
(I wont bother to comment on that other post, (not yours) .. It wouldn’t be right to do so on Easter, would it!?)
I’ve never been in a Jehovah’s Witness meeting hall. Just seen from the outside.
All religious systems and beliefs are not the same either in practice, beliefs or foundation.
I have never seen one that didn’t have some truth it in; some more, some less. Some a lot more, some a lot less.