I'm lucky as there's only been a few times in my life where I came close to a "98%/2%" work life balance. But when I did, I was doing shift work and my life was literally wake up - go to work - make dinner - household chores - bed - repeat. This is not the life Grace is living, and while she might feel very stressed, that's a different thing to physically having no choice but to work for most of the day. But it's clear she has that choice - she is still doing plenty of fun things like travelling/socialising, which are things which are often not even in the realm of possibility for people who do genuinely have that kind of work/life balance. It's also eye roll inducing hearing someone whinge about how hard they work when they are probably paying for cleaners, dog walkers, and personal assistants to deal with emotional and physical labour so those tasks aren't waiting for them after their work day is over like everyone else.
Plus, for someone who is constantly "balls to the wall" (anyone else hate this phrase of hers lol), she sure manages to take 30 minutes out of her supposedly non-stop day just to make a sequence of Instagram stories about how hard she's working.