It's just you.
If you have higher ball speed or less revs, you may need/want (probably more "want") lower RG balls,
OR
you could drill some medium RG balls with lower pins and use rougher surfaces.
It's never an all or nothing game. Humans have a tendency to want to simplify situations to make them easier to understand. The RG is only one of the factora.
As the USBC studies have shown, surface is significantly more important than almost any other one single factor.
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"None are so blind as those who will not see."