We can do anecdotes for days. I have worked at 3 remote companies, 2 transitioned from in person. It was clear to me that productivity at the 2 that transitioned became much worse due to remote. Productivity was never great at the other. I don't think it has much at all to do with hours worked but collaboration absolutely takes a nose dive when remote for the average employee.

I love working remote for the same reasons you do. Doesn't mean I think it's good for the company though.