Exploring the world outside of your core work is what gives you perspective. And perspective is very very important in building a business. Perspective and empathy, both of which cannot be "hacked" and can only be attained by truly living life and exploring the world.
I feel like you're suggesting two things in this post:
1. Holmes does not have perspective due to her focus on work.
2. Perspective is needed to build a successful business.
I think these are revealed to be inconsistent when we add in the following:
3. Holmes has already built a successful business.
Since (3) is known to be true, at least one of (1) or (2) has to be thrown out or weakened.
That said, I think DevX101 was focusing on her happiness and you were focusing on her success. We have no evidence that Holmes is happy. We only have evidence that she's been successful.