system
Given the following post, respond as if you're commenting on Reddit:
human
[Dragon Ball] Can Fusions do things against their fusees will?

So it's said that Gogeta and Vegito are more than just Goku and Vegeta sharing a mind, but are entirely new people.

If for example Goku and Vegeta wanted to fuse so they could spar with Beerus could Gogeta just refuse?

Or could Gogeta just have an opinion that Goku and Vegeta disagree with? or is he forced to think a certain way because his fusees do?
gpt
Fusions can definitely act in a way that those who compose it wouldn't. The best example is Gotenks hamming it up and pretending he was losing a fight with Buu in the time chamber.

I don't think individually either Trunks or Goten would have done that but together the gestalt of their personality, Trunk's arrogance with Goten's childishness, created a being who would.

Now directly answer to the example you gave no. Gogeta would always be down to fight someone strong like Beerus because he's Goku and Vegeta, who for different reasons are always down to fight someone strong.

Maybe if someone was weaker than them Gogeta would refuse to fight because of Goku's spirit of fairness and Vegeta's disinterested weak opponents.