no i am not married, and all the scenarios you have mentioned in your post has nothing to do with the issue OP has raised, and my opinion that i gave was based on situations like OP’s(which was only one issue of different styles of cooking). and i would still count that as petty issue.
i also disagree that parents have no right to try to correct their children once they are grown up or are married. but i won’t debate over this with you since you have a different opinion.