How does one live this lifestyle with children and/or other dependents, such as an elderly & infirm parent or a permanently-disabled sibling?
A lack of obligations is another kind of wealth; a privilege, even. I guess only people like you can afford to rise above this "poverty of spirit".
By the way, children are a choice in most cases. If you decide to have children in your twenties, I agree, you won't have the same flexibility that I had. That's kind of the point of what I wrote: you can pick your priorities in life. Career and children are a popular priority, but that doesn't mean everything else in life has to be a nice-to-have that you can only consider once you have the house and kids. Orwell wasn't caring for a toddler while he and his wife were fighting in Catalonia.