yeah I think it takes time to realize you need to actively develop these habits. I've been working remotely full time for 2 years and it wasn't until about a month ago that I realized that I wasn't exercising and doing the things I said I was going to do because I didn't prioritize them or make them a habit. I'm just as busy now with my work as I was when I was in an office, but during the day my office mates and I would take afternoon walks regardless. Also, I got a lot of steps in by walking to and from the office to where ever I parked my car (city jobs amiright...). So yeah, I've finally started a routine to go to the gym in the AM before work and/or go for runs/walks around my neighborhood at some point during the day.
tl;dr; you have to actively work to develop these habits because it's easy to just sit and work the entire day