I don't agree with the speculation, I think there is missing information. but I feel it's a valid possibility IF there isn't any missing information that can invalidate his point.
The difference between my stance and others here is that he is getting attacked because his post has the potential to "hurt feelings" and be "judgemental". There's a cancel culture-esque attitude that pervades the responses where people just sort seem like they enjoy getting offended or defending someones "identity".
Does a question that is "judgemental" and that "hurts feelings" should be ask-able on HN? Which is more important truth? Or the hurt feelings of a person who likely will never read this.
I'll be frank, it is pretty stupid to do what that man is doing. We're missing information here and the parent is asking the right question, albeit a liittle too harshley. But again who cares about the harshness. Just address the question and topic instead of protesting his "impoliteness" or his "judgement".