I have no problem with Apple pulling the product from sale. My complaint is over removing the product from the purchase history so that existing purchasers cannot redownload.
This is likely a licensing issue where it expired or disney wants to change the terms, and the content will be back up when a resolution is reached.
In the mean time, apple can't keep the content on the store for you to download, they have to remove it because there is no licensing agreement to distribute it.
Plus, the terms very clearly state that content may or may not be available for download at any given time, and apple is not responsible for content that disappears.
Sure it may suck for a few people who deleted the content and now are left without access to it, but a large number of people are complaining about something that has entirely no affect on them whatsoever. If you don't want to run into this problem, don't rely on apple to provide you with the download forever. Store it yourself either locally, on a backup or external drive, or in the cloud.