Yes of course they do . All ultra runners are extremely slow & can never run fast . Totally ludicrous idea. We might as well all stop now .
I think that's what you might as well have put as your original post and been done with it . !
In fact why don't you go the whole hog and declare ultra running events a graveyard for knackered runners . I'm sure it'll go down a treat .
Perhaps , just perhaps you should be a bit more careful about your generalisations in future .