The problem is you are thinking only about yourself which is what right-wingers are frequently accused of. You specifically might be able to work extremely hard

The problem is you are thinking only about yourself which is what right-wingers are frequently accused of. You specifically might be able to work extremely hard, persevere, etc but not everyone can. Work needs to be sustainable especially in the US which does not provide a lot of benefits to workers (healthcare, child care, PTO, etc). Also, you might be able to work extremely hard today but can you do the same 20 years from now or when you are recovering from an illness? I used to work 14+ hours a day but out of the blue got diagnosed with cancer. I still pushed hard during that time but a year after surgery and treatment, I have lost all motivation to work and can barely focus for 4 hours a day.