And proven to be true as well. This is not an "interpretation", it's an explanation of what rider switch is and who qualifies for it posted on their official website. I hold them to what they post as policy and up until the time we no longer needed it, never had an issue. Of course it can be abused as are many things at WDW. If they stopped offering anything that wasn't abuse proof, they'd have to close the parks down.
In all honesty, I don't ever recall reading a post from anyone who claimed they asked for a switch pass, they measured the child and were refused one. I'm sure there must be some, but I've never seen one.