If you do not chase the thoughts or try to actively think it should stop sometimes and not think all the time.

If I understand the article correct then rest is not about “not thinking”. Rest can also be about engagement (for example sports or a making music). Just using different parts of your brain which are usually not directly used for work.

If it never stops thinking try meditation practice, it will help after a couple times already (for me at least).

Also sometimes it can be good to “reset” the brain by going into the wilderness or a retreat or have a day nap.

That's why I go for walks. I believe it frees up time for the brain to think through stuff without getting interrupted. Sure it might be a series of incohernt throughs and ideas, but that's fine, now they've been processed and the mind can relax.

I also like doing this and I'll try to focus on what I'm seeing during my walk which helps my brain not to wander worrying about work or other stressors but it allows me to be in the moment.