It's a corollary to my theory that anybody that maintains close ties with their family and lives with them is a wholesome person.
Alternative possibility: the family's a cult.
Plenty of people maintain extremely close connections with their families while engaging in activies that are terrible for the world around them. Organized criminals. Terrorists. Business magnates. Political families. Corrupt police officers. Plenty of these groups are made out of tight-knit families.
It's common, dare I say human nature, to prioritize the needs of your family. That is honorable and important, but being a Good person requires caring about strangers too.
With the exception of the brothers in the mafia or brother terrorists, none of your examples would meet that standard.
Being close with your family does not mean you’re not a good person elsewhere. It does not mean you don’t care about strangers. That you’d jump to that conclusion or bring up terrorists as a counter example makes me question your own personal experiences.
All else being equal, I’d expect someone with close family bonds to the point of living with them as an adult, when they clearly have the economic means to do otherwise, as a sign of a good human. That’s been my personal experience and that’s how I see the world.