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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
That's not the kata's problem. People are free to reinvent whatever wheels they want.
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In any case wrapping it in this way would be consider a horrible indirection and a bad practice. Would be better to just use
Enumerable.max_bydirectly. It also breaks the ruby spirit of having all messages related to a class as methods of the same class.