If people don’t want others to assume that, then people shouldn’t speak as if they are.
If they want to do it, they’re welcome to. If they don’t want to, that’s their choice.
While you’re right, you can’t even make the comment (s)he did. You play baseball to play baseball. There is no variation or freedom to play how you personally want unless you (as you said) are a designated hitter/pitcher. MMOs have rolls that you fill. You’re a tank to keep things off your team and on you. You’re a healer to keep the group alive. You’re a DPS to kill stuff faster. We have the freedom and flexibility to focus on our designated role if we choose to. There is no repercussion for doing so. There is for playing baseball.