Why do guys think there aren't girls who partake in video games as well?

I am a girl who plays video games and personally I think I'm kick *** at it.  No I'm not some obese Otaku who just plays mobile games and dating sims, Alan Wake, Alice: Madness Returns, Alone In The Dark, Batman Arkham games, Bioshock collection, Blue Dragon, Borderlands series, Brutal Legends, Catherine, Dark Souls series, Dead Rising series, Deadly Premonition, Devil May Cry series, Donkey Kong Country, Donkey Kong Country 2: Diddy's Kong Quest, Donkey Kong Country 3: Dixie Kong's Double Trouble!, Donkey Kong Country Returns, Donkey Kong Country: Tropical Freeze, Fallout series, Grand Theft Auto III, Grand Theft Auto: Vice City, Grand Theft Auto: San Andreas, Grand Theft Auto IV, Grand Theft Auto V, Gun, Killer Instinct, Killer Is Dead, L.A. Noire, Lollypop Chainsaw, Max Payne, Max Payne 2: The Fall of Max Payne, Max Payn 3, Mega Man series, Quantum Break, Red Dead Revolver, Red Dead Redemption, Red Dead Redemption: Undead Nightmare, Red Dead Redemption Ii, Resident Evil series, Saints Row series, Shadow Of The Damn,

Silent Hill series, The Elder Scrolls V: Skyrim, The Witcher series, Tomb Raider, Rise of the Tomb Raider, Shadow of the Tomb Raider, Zero Escape: 999: 9 Hours, 9 Persons, 9 Doors, Zero Escape: Virtue's Last Reward, Zero Escape: Zero Time Dilemma and Zombies Ate My Neighbors are some of my favorite titles.  Also in my experience guys are thirsty AF when they realize I'm a chick online.