If someone can carry 12, more power to them. They still can only throw one on each delivery.
So you want to restrict bags with wheels. Restricting bowlers only to the balls that they can carry would hurt some of the older bowlers who can barely drag themselves in. Ever been there during convention week?
Even in the older days before wheels were allowed, I saw some who carried in 8 balls. Two 3-ball bags (one on each shoulder) and two totes.
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"Those who will give up essential liberty to secure a little temporary safety deserve neither liberty nor safety."
- Benjamin Franklin
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I am the SGT Schultz of bowling.
"I know nothing! I see nothing! NOTHING!"
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I just want 2C was'zzub.