Why pay money? P2P players are not very much better than F2P players

Nowadays the people who play for free (F2P) have access to the best characters of the game: Dooku, Yoda, GS, Rey, Poe, Poggle, Qui-Gon Jinn, Daka, IG-86, IG-88, HK-47, Resistance Pilot, Luminara, Sidi...