Wherever you read that it was written by someone who doesn't understand how probate law works or how real property must be dealt with when the owner dies. And there is no such thing as "rescinding" an "obligation". One can rescind a contract if the law allows specifically for that contract to be rescinded, and the rescission must happen within the time frame set forth in the law of the state where the contract was entered into. Rescission rights have absolutely nothing to do with probate.
When someone owns real property, whether it is a home they reside in or an shared interest in a vacation property, and that person dies, then the deceased's estate must be probated (yes, there are dollar thresholds, and rules for how certain types of assets can be transferred, but that is much too much to discuss here). Real estate can only be probated in the jurisdiction where it is located. It is the executor's obligation to comply with the applicable laws and to address the disposition of all assets owned by the deceased at time of death, along with other tasks like a final tax return.
When real property is owned by a revocable living trust, and the grantor of that trust dies, there is no probate. That is the entire purpose of trusts -- to avoid probate. That means that the successor trustee steps in and is able to legally deal with the assets owned by the trust without court intervention. It is a much easier and less costly process than probate.
When someone dies with or without a will, any heir can disclaim a bequest or inheritance. That is an act done by the heir. That doesn't relieve the executor from dealing with the disposal or other transfer of that asset. Real property doesn't just evaporate into thin air when the owner dies. And, if someone's will simply says "everything I own goes to XX" - if the deceased owned a car, a house and a dozen timeshares, then XX has inherited those assets, and can disclaim the inheritance. The executor still deals with those assets in order to close the estate. It is irrelevant that the will did not specifically list the 12 timeshares. It is up to the executor to take an inventory of everything owned by the deceased in order to properly administer the estate. The executor is a fiduciary and owes a fiduciary duty to the estate and heirs of the estate to properly execute the process of estate administration and ultimately report back to the court that all assets have been dealt with. (And yes, there are ways to dispose of assets or be relieved from the requirement of disposing of that asset, but the complexities are many.)