ofc he knows sage is the easiest agent to play but he played mostly duelist on c9, except small tournaments. why would he play sage on bind when thats a bad comp
by the looks of it you're just dumb thinking all jett mains have to play sage cos others do it, tenz on reyna is way more impactful and given the map lets him get ez picks and dismiss to cover
keep dreaming, sen are in honeymoon phase, and be ready for the xset takeover. pureR and zekken are the zoomer kings and they have the better neuroplasticity to learn more than tenz at this point