Acutally, he wouldn't either, by the SAO Ordinal Scale Movie (Which I personally didn't like, too much KiriSuna-over-plot AND they completely excluded Suguha for the main plot using BS reasons just so she didn't eclipse the two in the one setting she would have easily been able to
), Kirito can canonically fight off IRL a dude using a super-magical-techno-suit that lets him break the bones of several fully grown adults with one arm and move so fast he can ricochet off walls faster than the eye can see, after just like 2 days of training-by-Suguha-through-a-tablet XD