Most people "only" worked 9-10 hour days and that's not including commute

That's not what was shown at all. They showed that the working hours are flexible with people allowed to arrive when they want within reason.

At my office, some people arrive at 7:30am and leave at 4:30pm. Some people, like me, arrive at 9am and leave at 5:30 (I only do 30 minute lunches usually). Some people at the office come in a 8am and work till after 6pm regularly but they are absolutely not required to. They prefer to work at a slower pace for longer and that's their call.

"Wfh will be even rarer since people will be required to be at more in person"

That's unfortunate