Earlier quoted context omitted.
He climbs all these routes with a rope dozens to hundreds of times before free soloing them. The routes that he free soloes are also considered relatively easy to intermediate in skill level, well within his skill level. The really incredible part of his free soloes is just how long his body can last. It's Olympic levels of endurance.
Is his free solo climb of El Capitan considered an easy to intermediate route?
For a dedicated sport climber the route would be very difficult but doable.