Sounds like an excuse to be a piece of shit. Money doesn't make someone a good person. You're downplaying the necessity of a father figure and discipline in the household.
It is often difficult to discern what is an excuse and what is not. Some people are just completely off their rockers with little or no control over their actions.
Sometimes, money makes bad people, like the Menendez brothers.
https://listverse.com/2019/10/26/murders-committed-richA strong father figure does not hurt but it also does not always help. Tyler Robinson father Matthew likely has a very strong father figure. Possibly too much so. But then we don't really know much yet about Tyler Robinson or his family. All of them could be totally screwed up. This article tells very little about the Robinson family or its dynamic.
Most people want an explanation why they did it and who they are as a person when someone commits a brutal crime. Maybe it helps us distance ourselves from the perpetrator (I am nothing like the criminal). But there are rarely easy explanations as to why people do what they do.