The problem is, many companies are more hip about WFH than hour shifting. It's not a thing. If you start coming into work early to get more done, you will get the looks if you don't stay in the office until 6:00PM, just like everyone. That is not sustainable.

However, if you are a European or Indian offshore, then hour shifting is built in. Onshore, night owls are hard-working, and early birds are slackers - because no one can see them work.

What I am saying is, a lot of office work is optics. Being there and within line of sight of everyone counts more than being productive and in the zone. It's dumb as fuck.