Understanding Why Waterfalls Don't Allow Phantom Pulls

Is there a particular reason why Waterfalls don’t allow Phantom Pull? (see pic)

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We haven't heard back from you in a bit, so we're going to go ahead and close things out here - feel free to let us know if you still need something!
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Hi Jeremy R.! This thread was recently closed by our Support team. If you have a moment, please share your feedback: