Not OP, but answering for myself: I don’t enjoy exercising, and not doing something is far easier than doing something extra.
I have easily removed most carbs (doing Keto), and reduced my eating window to 8h. I’ve been doing this for almost 10 years. Hell, I even got an electronic desk and work standing 70% of my work day.
But exercise is extra. I can’t just do exercise while doing something else (maybe if I enjoyed audiobooks it would work better, but I’m really into reading books), so any exercise takes effort for something I don’t enjoy unlike all other changes.