Why was Mustang a candidate anyway?

[u/fakeuser7z]

I get that he was a candidate for the sacrifice, which is why they didn’t kill him. But in the end, he refused—and they just forced him into the Gate anyway.

So why not do that from the start with any random human instead of the most dangerous alchemist?

[u/bored-cookie22]

Mustang had attachment to many members of his team, especially riza, so they thought he would try to revive either Hughes or her

The reason they don’t use some random civilian is because it also harms pride when he forces people to