I really dont understand why Yasuo is never in LCS

Seriously just think about it + alone The enemy team is forced to buy items to counteract any engage they try ? ?

If a stronger more present situation was accruing those two items would be minus gold for a wasted itemization direction they choose.

Its a similar effect like playing and the enemy team has to buy pink wards after time it adds up gold 75 x 5 = -375 gold from enemy team

Since you know your picking yas you can have your teammates counter pick what would usually counter pick him so your always a step ahead, its organized play like i really dont get it.