It IS always Google isn't it? That's what turned me off of Quora. For me every other post is, "I work at Google and I think this", or the flip side someone asking about Google.
1) Google is able to be flexible about many things that other companies are not
2) If you work at Google, you have many job opportunities open to you that others might not. So just leaving and finding or creating a job where you can work fewer hours is much easier than someone working in a lower-end position for a small company in a market with few opportunities.