Generally the latter. The very short version is that he focused on cash flow, and liked (re) insurance due to success managing float and risk. From there, he'd buy/invest stable businesses and brands. Insurance wasn't his first go, he started bookie work as a kid.
As for saving, he was the guy with a big pile of money in '08 (and other times). Someone you call when your business is dying or you want to retire; he gets the deal, not you. His Bank of America warrant play was a big one from that time.
I didn't finish snowball, but the first half goes over a lot of it.
https://en.wikipedia.org/wiki/The_Snowball%3A_Warren_Buffett...
I like WB as much as the next guy and while he was wildly successfully at making money, he hasn't really done anything else. His main motivation has always been to make money for himself and his shareholders, so why would we expect anything else?
Some of his biggest investments are in things like candy, soda, beer. Not exactly great for society overall and not really enabling anything other than diabetes.
He was already an massively wealthy in 2008 and just having a huge pile of cash and using it to make more deals is not some great achievement to be celebrated.
Yes he made billions off of his 2011 bofa investment, so good for him and brk but what did this do for anyone else?
If BH didn't exist would it really matter? I don't think so.