I know that looks annoying but that's just not the way it works. DVC isn't holding back member availability so they can sell the rooms for cash. By law, Disney has to retain at least 2% of the DVC points (and the "at least" part tells me they likely own more than that). Just as we are able to rent out our points to other people, so too is Disney, and that's what they're doing - renting the points they own on a nightly basis for cash. So it's a completely different inventory. We never have access to the rooms that Disney puts up for cash. Also, DVC members are able to use their points for the RCI exchange and cruises (even though both are terrible redemption options). That stuff has to be paid for somehow. In essence, when that happens, members trade their points for a different accommodation. That accommodation isn't free. Someone has to pay for it. That's what Disney is doing when they rent DVC rooms at night - some of them are member points that have been exchanged for other things. I know it looks nefarious, but it's just not worth being upset over it because it has a completely reasonable explanation.
The availability issue is a genuine one. DVC isn't for everyone, and if someone is either unwilling or unable to plan a vacation nearly a full year in advance, they should not buy DVC. Disney aims for 100% usage with DVC, and they seem to get it most of the time. With certain resorts - Copper Creek, Boulder Ridge, Animal Kingdom (Value Studio), Beach Club - you must be able to plan and book 11 months in advance, or you will likely not get what you want when you want it. If you are only able to plan a few months in advance, you should absolutely buy Saratoga Springs or Old Key West via resale, because if you are able to book at all, it's likely going to be in one of those resorts, and that will be your least expensive option. It doesn't make sense to, for example, pay DVC Direct prices and dues on Copper Creek, only to find it completely sold out when you go to book at 8 months, and have to settle for Saratoga Springs at 7 months. You'd be wasting money.
That ended up longer than I intended. Ownership of DVC is a complicated issue and it isn't for everyone - and that's okay. I spent a long time researching everything there was to know with DVC before we bought in. I think a lot of the unhappy ownership comes from people who don't know and don't care to know everything that comes with owning it. For me, I couldn't spend that much money without knowing everything there was to know.