Most of the time, I would never come to Tony's defense. The idea makes me sick to my stomach. However, the way you're phrasing things makes the whole thing sound like it was his diabolical scheme. He had an idea and the whole thing got out of hand. He didn't build a murderous swarm. They became murderous after they were hijacked by Ultron.
I never said you weren't. I merely pointed out that we aren't the reason things have gone sideways.