Listening to a Novel

I was listening to a novel and came across this line: "This kid named Ying is definitely a pro gamer." I stopped what I was doing and checked the text because I heard something about testicles. Turns out, when I looked it up, it said: "This kid named Ying is definitely a high-level player." Why abbreviate 'high-level player' to 'pro gamer' like that? Makes no sense.