That's not even close to being right, the Shermans donated tens of millions to charity.
Plus BS gave the orphans $15 million dollars over the years. They also have wealthy adoptive parents so you have to wonder why they ended up with little money. Is continuously throwing money at people who mismanage it, really helping them or an obligation? Also he called back the money he gave KW when KW falsely accused him of killing his father. KW was given everything to build a renovation business and failed. BS also gave money to JD for his mortgage ($3M) and FD for his movies. Sounds like BS was more of a soft touch to a lot of people who had their hands out.
I dont think we know the extensive story of the contract and why the courts ruled in BS's favour. I don't think it is so cut and dry that he sold the company and was no longer obligated.