Are you incapable of doing something you actually care about with the freed up 36 hours?
I WFH with amazing TC and WLB. I do my hobbies all day and then work just a few hours. But I feel like an absolute piece of shit just coasting at work. Doesn't matter how well my hobbies are going, I'll always have the quiet stress of not contributing what I'm capable of doing. The times I feel good about myself are when I actually ship something cool with my team.