Is it blindness? I mean you have a handful of devs out of literal 1000's complaining. This is a textbook example of confirmation bias.
Also, they aren't claiming to know better than the handful of devs that have an issue with the existence of Series S, they are literally sharing anidotes and insight from the many devs they speak with as part of their job. Your misrepresenting their statements.
I don't know how old you are, but I remember a time when there were many in the industry that were struggling with development on the ps3. In many cases, if not all, games generally performed and looked worse on the console compared to its competition. Even though the ps3 was a very capable machine, it wasn't until the industry developed game engines to take advantage of the unique hardware (cell, split memory pool between two types of ram, etc..) that we started to see parity, and in many cases, superior performance.
You are already aware, but fail to give credence to the fact that Series S has hardware that assists in mitigating memory bandwidth and size limitations. The industry will of course develop engines to take advantage of these feature sets just as they did with every other console that has been released since the atari 2600.
Again, you already know these things I'm sure, but go ahead and keep your head buried in the sand. Your conspiracy theories regarding the secret intent of digital foundry are quite entertaining. It gives many of us here on Gaf something to chuckle at.