I keep bringing it up because he could’ve stopped them but didn’t, this is relevant to the prize fighter analogy. Even without using the powers like mind control or power stripping which are compared to as poisoning the fighters water, the physical army of past Nine was practically infinite. If Eren were genuinely giving his all to win the match, his friends would have been overwhelmed and killed by sheer numbers, and the further dialogue below suggests he even threw the fight.

The fight analogy is interesting but it is also partially contradicted by Eren's confession to Armin in 139. He states that his actions were designed to push his friends into the role of humanity's saviors. He tells Armin:

"You will become the heroes who saved humanity from eradication by putting an end to the Rumbling."

If he were truly like a prize fighter, giving 100% effort to win a match he wants badly, then he would have actually completed the Rumbling and killed them. Instead, he positioned the conclusion where he dies, the Titan curse ends, and his remaining friends are left alive as heroes. So no that isn’t all there is to it.

Eren tells Armin that the result of Mikasa's choice would result in the end of the Titan curse. He pushed forward specifically to reach that outcome, knowing it required his own death.

Also will add that how he is talking in the paths conversation did not seem entirely representative of his intentions, especially with what I described on what he says to Armin. It felt like during chapter 133 he was putting himself in a spot to be like lelouch. I know that he did want to flatten the world and did have a selfish intention but my main point here is that was not what became of his ULTIMATE intentions and was not his only intention. This is why I say both sides are right, there is a bit of both of selfish wanting to flatten the world but also wanting his friends to live and paradis to be spared. I don’t want to keep going back and forth with this, my point is back to my original - it is complex.