Alright, let us imagine Gojo as a sorcerer without a purpose -like the fandom wants him to be or what Nanami thought, I guess he can have fun fighting curses and sorcerers and then he can come home to his beloved girlfriend or sugar mommy. just like Toji, I know the fandom would love him for sure and will take no blame in what happened to Megumi. Maybe Gojo could have been happier.

Well have Megumi get back to the Zenin where Tsumiki can live a life worse than Mai.
Or in an orphanage where they might also get separated and adopted into different families.
Megumi will be fine, I mean what's the worst that can happen to him? emotionally hurt even more?

Let's have Yuta die too or spend the rest of his life in prison because Rika won't let him die.
Let Yuji who was born with a Sukuna finger turn into a vessel in Shibuya, after Kenjaku unseal all the items. I mean it's not like Gojo saved him. not that Megumi asked Gojo because he trusted Gojo will do that. no because apparently Gojo doesn't respect Megumi's choices, and takes away his agency.

Let Gojo get sealed in Shibuya because he has the six eyes, and no one cares about him to unseal him, not even the Gojos or the higher ups. I mean it's not like only his students stood up for him, and Megumi played the biggest part in that. Let him stay in the prison realm and let Kenjaku and Sukuna have fun in this world.
It is said that Kenjaku was manipulating the higher ups and Kamos after Shibuya, but if Gojo was still an irresponsible sorcerer who didn't care about the juju world and not an important figure like today, Kenjaku would have had fun doing what he wanted long time ago.

Who else actually tried to fix the juju world? who would have stepped up and tried to actually change the world for the better?
Geto? who made a cult and his girls said: "if Geto sama said white is black we'll believe him" ? Maybe he'd recruit Yuta (although he tried to kill him in canon), Megumi and other sorcerers and is trying to kill people who has never heard of curses.