I think with that aim he should be playing duelist surelyyyyyyy.
Primmie is a good flex player and he doesn't play Neon. Look at every other team and you'll see they have their best aimer on Senti. Alfajer, Leaf, Benjy, yetujey, ... Also Primmie did play Jett on Abyss in stage 2 APAC.
Keiko just got moved from duelist to smoke because he has the best aim but is not aggressive enough. S0m also wasn't on duelist even in 2023 because he's disconnected from the team on Jett Raze. We don't know what happens behind the scene.