I'm sorry, I can't go off of blanket statement like "It's excuses that cause a person not to reach their goals".
It looks great on a t-shirt or as a slogan, but in real life people have to make priorities and people will encounter difficulties of varying degree. That's not say their isn't some truth to it.
On one end, you have the person with pancreatic cancer who also has full blown aids and on the other hand you have a whiny little runt who says they can't do their job because of a hang nail. And then you might have someone with great genetics and brought up in a family that teaches great work ethic and many connections from the family, and then there's the person born with a severe down's syndrome in 5th ward in H-town raised my multiple terrible foster parents.
I always have to make sure that I see the different shades of gray in between and understand any mitigating circumstances.
Having said all that, I find my work suffers if I do full out training more than 3x a week. I'll still do conditioning and work some weak points with small movements in between.
So how did you build yourself up to your current work capacity.