Imo judgemental as in starting from "my life experience" and getting to that's "how to live" is a reason to dismiss it as an argument, as others may have different life experiences and yours is not universal.

It is when there’s no concrete reasoning behind it. The reasoning provided here is “well I don’t like it, therefore it must be bad!”

That kind of thinking would be acceptable if we were like… 8 years old. But as an adult, having that reasoning process is embarrassing.