I’d say there’s some differences between biking and gym in terms of whole body strength and flexibility, but it’s good exercise. Definitely more productive than driving.

I think one point that can still be made is that this schedule means your average day (averaging over weekends) contains 7 hours of work/commute and only 3.5 hours of hobbies/activities.

A move to a 30 hour work week would mean that you would only spend 5.5-6 hours a day working and get 5 hours an average day for hobbies/activities.