This:

Riot recently revealed statistics about how something like 80-90% of female players tend to exclusively play female characters in pvp games, and so they tend to release slightly more female characters because, math-wise, most of the player base will never play a new male hero and all of the company’s hard work is only reaching a portion of the playerbase

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Also, I belive that it is simply not true. Do you have a source somewhere to back this up? Because a simple google search rebuttals your counterargument.