YEs, pizzagate originated on 4chan, ie. users of 4chan were the first to notice the weird language in the emails and discuss them. Not every word they name as a code word works out in all cases, but that is only the tip of the iceberg.

You are attacking the source/appealing to authority, rather than addressing the evidence the 4channers (and redditors) found, laid out in detail in the articles I linked. I will say though, that I too was once skeptical, since not everything I saw that was pointed out was valid or compelling. However that is simply the result of so many different people online participating over time and wanting to find the next big item of interest. When all the chaff is removed, however, a good case for organized pedo shit is made, on the whole.