Deep thought

Vegeta could barely stand, Goku was standing perfectly fine. They all intended to go to Bulma's spaceship, and Goku was perfectly up to it. Not to mention, nobody said anything like "Goku are you sure that you are up to it?". Gohan, after the Vegeta fight, might've not even got a zenkai, there's really no evidence of that.

As for Vegeta post Zarbon fight, that's a joke to compare it to Goku's injuries, right? Vegeta was crawling on the ground and he lost consciousness, and, overall, he wasn't much better than he was on Earth.

And what are you trying to say, that Super Sayajin heals completely you when you transform into it? If so, then I don't even know what to say about that.

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