Even if there isn't, it's his choice. Maybe you don't like it, but you have to respect his decision.
[Steve is...probably talking to himself because he doubts Tony will listen. But he's being honest. Maybe he doesn't necessarily agree with Bruce's means to do this, it's still his choice. If he wants to cure his Hulk problem, he should do it. It wasn't Steve's place to tell him what to do, and neither was it Tony's.]
text;
[Steve is...probably talking to himself because he doubts Tony will listen. But he's being honest. Maybe he doesn't necessarily agree with Bruce's means to do this, it's still his choice. If he wants to cure his Hulk problem, he should do it. It wasn't Steve's place to tell him what to do, and neither was it Tony's.]