Other esports titles have longtime career players (Jaedong (28 years), Zeus (30), Edward (30), NEO (30), TaZ (31), f0rest(29) and others), i don't see problems having the same for LoL. Plus all 3 named players are mechanically gifted and was praised for this during their career peaks.
"They're all 24-25 years old which is about max age pro gamers retire"
This bullshit statement i've seen so many times, for like last 18 years, yet it was proved again and again that it's not true.
P.S. I can see Oddone, Dyrus, Yellowstar, Reginald, nRated, Nyph, Snoopeh, Yellowpete, etc retired bcs of how good new players become while they was always bad mechanically (overall early LoL years pros). But League became stale since then, it's like 2-3 last seasons discovered everything from League (difference btw season 1 decent mechanical player and season 4-5 is insane. If u play Lee sin now u need to be able to perform "insec" move at least while in the past it was mechanically hard move). All this new talented players can play for a long time, atleast until Riot decide to shut down their project.
Would also include Xmithie to the list who is 26 years and just became an NA spring split champion