Does the author owe you a good, analytical argument? You were able to respond to it with your own experience easily enough. That's usually how conversations like these work.
I don't understand what exactly you're criticizing GP for or what you'd like them to do differently. And then: do they owe you whatever you'd like them to do? Do you owe anybody a clearer argument? How many people do I owe time for reading this comment? I feel like you opened a can of mirrors. ;)
I'll just say that, when broken down into three parts, the middle part effectively engages with the post and is a valid contribution all on its own, and the first and last bits just seem pretty pointless criticisms.
The parent poster isn't exactly responding with their own thoroughly analysed thesis.