Congregational meeting is one and only social interaction for the most of JW, so it is natural they want to see and to be seen. Trying to look good on screen means shower, shaving / make up, dressing up, all good habits which could be easy neglect during quarantine. I can understand that Zoom thing as a sort of comfort for the most of JW.
I'm inactive for almost twenty years, but i dressed up and put a tie for this memorial and attend with my pimi wife and her mother (our camera was off, like always), it meant a lot to them in these circumstances, no matter they know that i'll never be back again. I look on JW as doctor look on patients, if you cannot cure them, then just try to easy the pain.