Yeah, and he was also in a state where the same strategy kept working again and again, so he may have been convinced it's a fundamental aspect of reality.
Any time SBF ran into trouble, he could just raise another round of financing, or borrow against artificial valuations, or "smooth things over" with the right people.
Once that happens enough, I imagine a lot of people would start to feel some cosmic entitlement to it, like that's just how it is, the FTT tokens must be worth $24 each, it's only a matter of "getting liquidity"[1], you can always raise more money, you can always call in a favor, you can always borrow against what you think the assets are worth, there's no reason to hold customer assets in their original form.
Heck, even to the very last days, when his attorneys and CFO were telling him he had to declare bankruptcy, he adamantly insisted that new funding was just about to come through -- and even that he got the offer moments after declaring -- but, of course, he can't say who, or under what terms, even why they would invest. [2]
Personally, I always try to maintain a frame of "these good times don't have to last, they can go away at any moment, so make sure you're ready for if/when that happens". But maybe I'd falter too, in the same position.
[1] A frame even informed observers buy into! Earlier comment: https://news.ycombinator.com/item?id=33539326
[2] ctrl-f for "Mr. Bankman-Fried was also frustrated.": https://www.nytimes.com/2022/11/29/technology/sam-bankman-fr...