[Well, all those things are technically true - and, as (hopefully) the only person on board who currently knows Bucky's trigger words, Steve definitely plans to do his level best to make sure everything Bucky does, good or bad, is his choice.

Even so,] I understand all that. I'm just saying, it's - It's like taking responsibility for someone under your command. Does that make sense?

[He doesn't want a bad decision coming down on Bucky or Ford, when Steve's the one who put it into motion. That's all he's trying to say, whether it's really any different or not.]