Like the article says, their internal risk management models are telling them to get the risk off their books.

Taking on the debt in the first place is like agreeing to store a gallon of milk in a fridge for an undetermined amount of time. The milk is going to go bad, and when it does the jug (or bag) might explode forcing a cleanout of the fridge, throwing out other things in the fridge, and maybe replacing the fridge altogether if the milk leaked down into a lot of crevices. Everyone knows the milk will go bad, but the big banks will know how old the fridge is, what coolant it uses, how old the compressor is, how many times a day the fridge has been opened, the average time it stays open, the dairy the cow who produced the milk, and the name of the cow if they can get it. The milk is going bad quicker than expected, and they're finding out they don't want to be the ones to guess when the jug will explode, and they're also finding out that nobody else wants to buy the jug.

Oracle pulling a "god did it" was probably a part of this, but nobody involved is going to give a real answer.