I don't know how old GP is but their life sounds like it's pretty enjoyable and not what we generally picture when we think "a life whose main focus is money".
I think what they're saying is that it's important to focus on money early on if it's achievable for you to reach this level of independent wealth in a reasonable time frame.
It's not a terrible advice. I'm still trying to but my first apartment at 38. It's essential to have a some financial ability (or willingness to plan ahead at least) to succeed in life.
