Well I'm glad things are going good for you. Some of us are still struggling. Many people are too poor to splurge 1K on a luxury office chair. This article is about those people.
These are not explicitly stated in the comments, but can be reasonably inferred from the context.
I sit in many weird positions throughout the day.. lean back, feet on a box. straight up and down, legs crossed, lotus, and yes, I squat on it too.. sometimes on my knees, sometimes the chair reversed.. pretty much anything that keeps my head above the table.. totally privileged, I know :)
Hell, the last chair was thrown out after it literally broke apart, it and before it did, it was crooked to one side for a few years. I'm 35 now, my back is perfectly fine. It's not about the stuff you've got, it's about you.
It's basically a blaring bourgeouis flag if the past year has been pleasant for you.
The less well-off and young are suffering greatly.