ET doesn't understand Feynman diagrams so, unfortunately, he's promoting a common fallacy
: a Feynman diagram on its own is kind of a visual non-sequitur. Generally speaking, they are used in combination. How many? That depends on what particle interactions you're calculating. Here's a recent example
: "...we have evaluated all 12,672 diagrams
..." Clearly, even the visual aid
of Feynman diagrams breaks down well before that number.