Where did you find this?
Though apocryphal, it would give the Númenoreans a solid reason to see the Valar as deceitful. "The Gift of Men cannot be taken away - except for Tuor, due to reasons we will not explain."
After a revelatation such as this, it would be far easier to accept how quickly Sauron managed to incite them to attack the Undying Lands. The kings would have known that immortality was somehow possible for men and the temptation would have already been there for generations.
The canonical version works without problems, but I think this would have been a nice addition.