Christ, talk about a broad judgement on a certain breed of male. Unless you have met and spoken to every cuckold, how can you make that judgement. To say psychology is medical 'quackery' is a fucking insult to anyone who has mental issues, whether that be sexual, anxiety, depression etc.
Make sure you bring that thought process up with returned service men with PTSD, just tell them, 'get over it, its all in your head'. Just because you're a great fuck and all your experiences have been positive ones, does not make that the case for anyone else.
Your marriage isn't the same as mine, your income isn't, height, race, cock size, wifes pussy, staying ability, dominace/submissiveness etc etc etc.
To say tell some to just move on about having a very small cock that cums quickly, is easy when you have an average or large one and can last for ages. The beauty of the internet and freedom of speech is, if you don't like reading anyones psychological bullshit, then do just that, don't read it.
To call anyone who is not great at fucking, lazy is bullshit. To me thats just a lazy opinion that can't be bothered digging deeper into the reasons why.