I think using words like "lie" are too strong for what is happening. There are certain legal, contractual items that are in the documents. You should be aware of what they are and be comfortable with the idea that this could be the way events turn out. Because they are being laid out in the legal documents you sign, this could be the way things would happen in the future.
I do not know for a fact what your guide has said but I'll assume they are giving their opinion, based on their knowledge of how Disney has functioned in the past, as to what would actually happen. An example of this type of thing would be that the legal documents do not allow for any member to be given any leeway for trips that are cancelled at the last minute or "forgetting" to bank a year's worth of points. Legally, we are out of luck. In practice, DVC has made exceptions. Many are familiar with the "one time" exception that has helped when there is a sudden death in the family or a major blizzard that shuts down air travel in most of the country. Rules are bent and points are restored.
If your home resort were destroyed and could not be rebuilt, then maybe you would be out in the street. However, if there was some repairable catstrophe that hit one of the resorts, my guess is that DVC would find some way to allow members to use other DVC and/or WDW resorts. There is no guarantee or promise this would happen but it is a reasonable assumption based on past practice.
A smaller version of this -- Some people were using an unrealistic amount of towels. DVC instituted a rule that allows them to charge for additional towels. Do they enforce this rule for every one towel someone requests from housekeeping? No. Could they? Yes. They have protected themselves but allow common sense to rule how it is enforced.
It is also in the documents that banking and borrowing could be ended. The exchange program with Disney resorts could end. The point schedules can be adjusted. All of these things "could" happen but have not occured during the first ten years of DVC (with the exception of one adjustment of points in the early years).
For those who bought the original Disney Vacation Club, the wording about "additional resorts" and "offsite resorts" and "home resort priority" were all pretty fuzzy. Luckily, that has all worked out and is actually a bonus to our memberships.
Don't let legalese scare you....but be sure to read it all and keep the information "back of mind" for the future.