Reality is we’re talking about green orcs, not humans. And a fantasy video game, not reality. None of those things have to apply to the physics of the game, the devs/writers/artists/etc can just be like “well female orcs are physically just as strong as male orcs” and that’s that, there is nothing else to be said. It’s not like you get a strength debuff when you play a female human warrior or something, they’re exactly the same.