Productivity doesn’t go down with fully remote work, but I think the kind of creativity that organically comes from ideas being constantly shared and discussed does
To be clear, I don’t think it’s always people’s job to be creative, and company’s should absolutely have roles for people who can work remotely who just join scheduled meetings and execute “the plan”
Where it doesn't work is in hybrid offices because people showing up at the office won't want to connect to some random videocall to do what they do all day every day.
I’ve worked remotely and had a great time innovating, and I’ve been in person and had a terrible time innovating. It has always come back to giving folks a comfortable forum to share ideas and not rejecting them.