Hmph read the manga then you will know that how alone was gojo as the strongest and the jujutsu society only saw him as a weapon as if there is gojo we are safe that's why gojo wanted to make a team of sorcerers who can exceed him
Frfr geto knew it how selfish the society was that's why he left it, even though gojo also knew it he couldn't leave anyone because my the mere existence of Gojo the curse in the jujutsu world became stronger to match the capabilities of him