Disney simply isn’t Lucas, who (like it or not) was still an “artist”. Disney is pure corporation and what they care about is making the profit. Releasing OOT is simply unnoteworthy compared to the profit they get from making new stuff.
To paraphrase : Disney only cares and money. Therefore, they won’t sell a product that costs practically nothing to produce and that will sell like hot cakes at $100 a pop.
When you operate in billions, several millions is unnoteworthy profit. All it would do is basically steal lots of publicity and attention from the things that make them billions now.