Anybody could be disposed of for different reasons and perhaps who get’s prohibited makes Universe 7 work better commonly. Gohan giving up himself may make Goku to sincerely have the capacity to control the quality of Ultra Intuition far higher than if any other individual was disposed of.
So the following disposal for Universe 7 could be Gohan. Leaving the warriors with more prominent battling background in the ring to have a critical influence of this competition as it goes on. With adversaries like Jiren, I think in the last it is quite recently going to come down to cooperation in the event that you will beat him.