Apple has a problem - too much cash on hand.
Yes, yes, "It's a great problem to have."
But only if you are an actual person.
However, Apple is a publicly traded company and different logic applies and none of the alternatives are good.
So long as Apple holds the cash, there is the implication that they lack a long term strategy in which they are confident enough to invest a large sum of money.
Conversely, if they can't spend that much cash expanding their business without announcing their plans prior to product role out unless they use it for acquisition.
The problem with acquisition is finding a plausible candidate valued at $50-$100 billion, and it is highly unlikely they can quickly buy a portfolio of smaller companies large enough to make a dent in their cash without significant risk of public failure inherent in a bad purchase.
As for paying a dividend, that suggests a lack of vision and long term strategy even more strongly than any of the other alternatives.
A large amount of cash on hand of course isn't the worst problem a company can have, but it suggest a certain degree of inertia.