Simple Folks have Simple Luck

The sentence "傻人有傻福" translates to "Simple folks have simple luck" in English.

My friend is a simple-minded person. Despite life’s complexities, he finds joy in simple dreams: a peaceful life with his family.

His story:

🏡 Luck brought him a great BTO flat.
💑 He’s lucky to have a supportive partner.
💼 Luck kept him at the same engineer job for 20 years.

🐢
Is it because he is simple, hence he got lucky?
Or
Maybe he is happy because his expectations of how life should be are lower than how his life actually is.