Correct.
Different categories have different prep regs. Otherwise they wouldn't be different categories.
Everyone here has heard the "safety" canard as a support for a preferred rule change. It's been trotted out many, many times. No point in bringing it up lest we smile toward you and say "bless his heart..." If you think a particular ruleset is unsafe then it is your responsibility to not participate in that category and seek out one that meets your personal safety needs.
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