You're just weaseling out now. You're declaring values and prior events that only support the position you want to double down on without evidence and without compromise.
It doesn't matter if it's possible for him to have a healthy romantic life. Why is that even an argument? This manga's premise is literally about the idea that he can. It doesn't matter what you think is right, we're just arguing what the parents think. And the evidence is there for all to clearly see. The parents are strict. That is a fact. You have no evidence the parents dated in high school, or dated anyone else. I don't either, but you're the one trying to prove they're 'hypocrites'. I just need to offer the most plausible explanation for their position. There are all these plausible explanations why they are strict, given their family background. What else matters?
Apparently, because you do not agree with how others think, they are hypocrites. I remind you that being a hypocrite requires you to go against your own position and values, not someone else's, nor what others personally believe to be universal fact. That is the sum of your position, if you think about it. And regardless, what you're essentially saying is the parents have no reason to act as they do and are just inexplicably the way they are. You don't agree with the reasons people chose to act a certain way, therefore those reasons don't exist. Ridiculous.