Yes i agree its a choice and the other free games can be nice, the thing is its a different genre compared to those other free games, so some might enjoy CSGO more and spend more time in it, but others might not like and want just a singleplayer rpg like Genshin.
Emulating is nice, but i guess the con is that you can only play old games, and man i barely use the Epic games store, only just play Fortnite there and just deleted it once i was done with the game, other subscription service like PS Plus and Xbox game pass offer lots of nice games for free, but it cost monthly.