I will not purport to speak for others, but I'm not certain of anything. There are certain posters, however, who speak with absolute certainty and authority about and on behalf of nameless, faceless "lots of" others (sometimes called the "vast majority"), and I *think* others question the source and the particulars of this certainty at times. I think you've waded into the middle of one of those times.
I will address your specific example though. I *think* you are right about the history. It's my understanding (and I am no authority on this, but this is what I gather) that the campsites used to qualify for free dining, and people booked throwaway campsites with free dining. In that case, I think Disney realized that when you consider the cost of the dining plan (especially when multiplied by the number of people who could stay at a campsite) vs. the cost of a campsite per night, free dining didn't make sense (or cents

) in that context.
I personally think the mathematics are a little different in the case where there's no dining plan involved. I also think your average Joe is more likely to take advantage of a throwaway when they get free or at least heavily discounted food vs. when all you get is a return on your investment (cost of room = cost of Magic Bands + cost of parking for 2 days), and a 30 day advantage in regards to Fastpass. I guess my point there is I think the number of people booking throwaways in a free dining scenario would be greater, and thus have a more obvious impact. Regardless of this thread, I don't think throwaway rooms are a rampant practice right now, nor are they costing Disney anywhere near the amount of money that a throwaway campsite with free dining would have.
To be clear, I have no idea what Disney is going to do. I haven't seen any evidence that anyone else chiming in here knows any more than I do. I just bristle when someone continues to say "Disney will shut this down", "It's just a matter of time before Disney shuts this down", "WHEN Disney shuts this down", when there's utterly no evidence to support it.