No.

Yes.

Everyone has the time, not everyone has the priorities (this isn't a dig, it's a reference to some inspirational speech I heard in high school). 50 hour work week and 56 hours of sleep leaves 62 hours in the week. Probably another 12 hours split across 7 days for cooking, eating, etc. which leaves 50 hours to recover, study, exercise, or do whatever she pleases.

She values using those 50 hours to recover from the 50 working hours more than learning a new concept. That's not invalid or wrong in any way, everyone has their priorities and values and they're allowed to do whatever they want with their time.

That being said, everyone has the time they just might not have the mental space. But increasing your human capital by learning something new is often a great way of reducing stress. Learn to handle something in a new way, learn a little about financial theory, learn something that helps you at work. The best weapon you have against the injustice of daily life is knowledge. If you have the mental space, find the time to learn something

ETA: Coming from the perspective of a full time student who spends 6+ hours daily searching for a job because I've been down on my luck since quitting a year ago. I grew up poor and watched my mom work full time, put herself through school, raise three kids, and continues to fight every day for the right to live; I know the struggle you're going through right now. Spend your time better than I did.