How do you know? You're once again believing that this magic 50% shit-number is actually real! Again, for your argument to be valid you'd need to prove to me that this 50% number has an actual scientific basis.
And isn't pulled out of someone's ass.
It could very well be that what you think is "50% of successful appeal" is actually a "80% of successful appeal" and they just moved the threshold by padding the numbers.