Skillshots should do more than targeted spells

Hello there is something that grinds my gears and it is mostly coming from the mages point of view. it realy grinds my hears when annie has a targeted spell that deals more damage + can stun (NOT snare) on will and other champs such as ahri if they miss one skillshots they get left with nothing. I beleive the more challenging a players kit is the more hard to pull off the more rewarding. How can veigars R deal so much damage.

Sure many will say that champion as ahri and lee sin have mobility and other stuff but really thats no excuse.

Edit: What i Meant to say the larger the risk for one champion to miss the larger ther reward. the lower the risk the lower the reward. That is my personal opinion. free discusion please.