You do have a valid point max, I too once thought that was the way it was surpassed to be but since then I learned otherwise.
However one big issue would come into play; Most if not all of those world record 8ghz+ cpuz validations would have to be taken down from the rankings (hell might have to remove ALL cpuz validations) because for good or bad right or wrong validating on less cores has been the norm since it began. That would leave a lot of unhappy campers loosing their minds as to why their hard earned validations were taken down.
Then next a new category for CPUZ validations will have to be created based on and separated by core/thread count. Dont see that happening any time soon.
That idea could however be a suggestion for adding such limitations as part of a future completion.