There's so much at work to the psychology of buying DVC, and I think Bill hit on a lot of it. Disney is an expensive vacation, and quite frankly it is out of reach for a lot of people. DVC can potentially save you money in the long term* as compared to other on site booking options. However, when you buy a contract and finance, your net cash flow for year one is positive as compared to booking a direct stay because you are avoiding the lump sum buy in cost and instead simply paying a monthly payment.** People choose to ignore the fact that they are deferring the costs of today's vacation and spreading it out over the next 10 years and instead focusing on the joy the get from "ownership". We've seen it on here a lot, people saying that buying DVC direct and financing is the only way they would be able to afford to stay in Deluxe resorts. So long term implications aside, people do what they have to do to stay in DVC resorts right now. Whether this is good or bad, right or wrong is a value judgment that will certainly vary by individual.
I will say this though, there is a certain "satisfaction of ownership" that comes from owning DVC that is hard to put a price on. It's hard, but not impossible. For me, that price was laying out the $58 net price per point up front to buy BLT resale***. I'm totally thrilled with my ownership at this price and have no regrets. For others, it's $165 ($143 if they rent out the points they get at closing) a point for BLT direct. I have a feeling that those owners feel the same. Financially speaking, however, one of us got a better deal than the other.
Or....to put all of the above paragraphs into one succinct thought...people have a "gotta have it" mentality and will pay anything it costs to have what they want, regardless of whether or not it's a good deal. Again, no judgment, but that's what they're doing for better or for worse.
By the way, here are why I put *s in my comments above:
* I said that buying DVC can potentially save you money in the long term over other onsite booking options. However, I am really only talking about resale as I am not convinced that at today's prices, buying direct has any financial advantage whatsoever. Certainly not if you finance.
** It's a monthly payment. Another example of the terminology used to soften the blow is that people refer to this as a "mortgage". Technically a mortgage refers to a debt assigned against ownership of a piece of property. As a DVC owner you have a right to use for a limited period of time. In reality there is no real estate that you own.
*** $80 per point plus closing and maintenance fees for a contract that contained three years worth of points. I rented all three years worth of points out for $11 each, giving me a $34 net cost per point.