The only reason some people struggle to understand the behavior of Musk, SBF, Trump, and others is because of an assumption that a certain level of wealth or power implies some level of rational behavior.
That assumption is often, but not always correct.
We aren't astonished or confused when a broke high school dropout maxes out their credit card on Candy Crush in-app purchases and drives drunk and crashes into a tree. Some people are stupid and stupid people are going to make stupid, thoughtless decisions.
People are more surprised when the rich and powerful do dumb shit like this because of a presumption that they must have been consistently able to not do dumb shit in order to acquire their stature.
But that assumption is very often wrong. Trump had his father slowly plow $700m of his wealth into his son in order to burnish his own image. Musk inherited wealth. SBF came from prestige and then lucked into a historical moment where fake Internet money could temporarily be exchanged for real money.
These people are just fucking morons with limited ability to delay their gratification or think through the consequences of their actions who happened to win the lottery. Most of the time, it's because they lived an entire childhood where they never needed to learn to think about the consequences of their actions because they were completely insulated from them.