Seth has admitted that longer ultradistances are not in his wheelhouse at this point in his life and often brings up that he dropped out of his only 100 mile race. His charity run this Spring was his longest run ever (50 miles).
He also has run very few road races as far as I know from watching him for almost exactly a year now. I think he considers himself a mountain/trail runner who would like to run a fastish road marathon once the world gets back to normal.
Sounds like a bunch of good reasons for everyone criticizing other runners to STFU.