So, basically, you're convinced by the window dressing rather than by the actual argument behind them.
If the numbers and test charts make sense, then the argument makes sense and the photos are superfluous. If the numbers don't make sense or contradict their argument, then no number of pretty pictures will convince me otherwise.
That pre-requisites the technical ability to comprehend what the test charts show, or at least an interest for those discussions.
I can related with the feeling of some posters lacking an engineering background that, in the end, technical discussions only matter when they have a practical value to generate "better images".
But... I cannot relate to the idea that it is a mandatory responsibility of the poster of a technical topic to prove with his own images that this is the case, nor that failure to provide such a proof discredits the point being made and the poster making the point.
Now, technical posters not willing to illustrate a point with an image should know that those non technically educated forum participants may not be able/willing to benefit from the practical benefits of the knowledge being shared.
Cheers,
Bernard