There certainly are "ultra" routes that essentially require just speed hiking. But the majority of 100+ mile ultras are not like this, and allow capable runners of moving much faster than "speed hiking" pace.
OP said "Ultra events with 100+ Miles and tons of elevation gain" (emphasis mine).
"Tons" is subjective, but their statement is objectively true for a bunch of ultra marathons - Tor des Géants and Barkley were just the ones of the top of my head. He is not "totally incorrect" as you said.
"Tons" is subjective, but their statement is objectively true for a bunch of ultra marathons - Tor des Géants and Barkley were just the ones of the top of my head. He is not "totally incorrect" as you said.