The evening stuff is nearly always just minimal email check that seldom takes more than 10 minutes. At my last job (where I was full time remote), my schedule was working 6am-4pm working, taking a break to spend time with my family, then real work from 8pm-midnight. This is a huge improvement.
Not all that 9.5 hours on campus is working time. I generally take a break for breakfast & lunch, hit the gym a few times a week, and try to spend an hour or two a week on fun, non work related things (like author talks).
spending 9.5 hours at work doesn't mean they were actually working for the whole 9.5 hours. There are onsite gyms, cafes, author appearances, clubs for various interests, running errands, etc. Going to the gym in particular is a big part of a lot of people's workday.
Not all that 9.5 hours on campus is working time. I generally take a break for breakfast & lunch, hit the gym a few times a week, and try to spend an hour or two a week on fun, non work related things (like author talks).