I thought this article was interesting:
globallessonsonlearning.com/2017/02/23/rows-vs-groups-have-your-cake-and-eat-it-with-creative-planning/
"Eager to try something new, I arranged my tables in horizontal rows facing the front. It worked: behaviour rapidly improved. On the second day, the deputy head walked in and saw the layout. Obviously not happy, she pulled me to one side and said ‘that’s not how we do things here. That looks appalling to anyone that walks in – it looks like we don’t do collaborative learning, and we do.’"
I've read a number of instances of teachers being actively forbidden to arrange desks in rows, even for older children. But even Finland has primary age desks in rows, so is there really something that wrong with it?