That's a pretty privileged take there. No, not everyone gets to choose what makes them happy when they have obligations to others or even to themselves if they want to eat that night or not. Glad you do, but don't assume everyone does.

I think that is a misrepresentation of what the parent was saying. OP is not suggesting everyones gets to do what makes them happy, but rather they are free to say what is important for their happiness, even if others disagree.

This seems like a misreading of the comment. Anyone can choose for themself what matters to them, which is a different question from to what extent you can get everything you want without compromises.