Forced as in once you buy DVC you need to use the points within two years or you lose them. So in essence, yes you're forced to go to Disney every year or two years. Banking to RCI points doesn't get you as much. My wife's family owns DVC, I know the program well enough. I have yet to go to Disney without going to the parks. You go down for F&W and you're going to go to the parks, you go down for Christmas or New Years, same idea. If you go for any of the tons of events that Disney throws each year, you will be going to the parks.
Sure, I guess you can decide to just stay in the resort and do nothing or just go to places outside of Disney, but I doubt that's the case for the average DVC owner who goes once or twice a year (or every other year). I have a few Facebook friends who have DVC and every time they go they're taking pictures of themselves in the parks. I'm sure the percentage of people who have DVC who to WDW, not go to the parks, eat either outside of Disney or in their room for every meal and all that is very very small.
I can see a DVC member maybe staying at Disney for a week and then only going to the parks for a couple days rather than 4 or 5 days, sure. However, not at all is probably a very small percentage.