Her take is perfectly reasonable:

“I call it work-life integration. There are times that your life requires a lot more, and there are times that your work requires a lot more. … I don’t think that’s a bad thing.”

Sometimes I pour more into work, sometimes life needs my attention. Sometimes I'm eager to finish working on a work problem, sometimes work can fuck off for a bit. At my last job I'd sleep in in the mornings and work past "close" when fewer people were bugging me.

I find it more stressful to be strict about keeping work and life seperate. Maybe I want to login at night and test some ideas that I wouldn't risk during the day. Many times I've been on a hot streak and don't want to stop at exactly 5PM. Maybe I'm not getting a lick of work done, know I'm being useless and pop out to hike before I run out of sun. If I'm bored shitless, I may run through my email and clear out the crap so there's less staring at me Monday morning.

Did no one read the article? Or have none of you had a professional job with responsibilities? FFS, she's merely saying do what works for you. Point to a single unreasonable thing she's saying here.

tl;dr: I was already working exactly as she talks about and that left me with the least stress, most satisfaction.