The worst part about a Blackhawk is that it won't go off when you pull the trigger.
A Smith will.
Since no smilies were used, it is difficult to say if this comment was made in jest, sarcasm, or is simply missing the word "only", or "just" and is a comment on the fact that the Blackhawk is a single action and S&Ws are DA revolvers.
It is true that a Blackhawk won't go off from only pulling the trigger. Or from "just pulling the trigger". You have to cock the hammer, FIRST.
With a S&W, and its DA action, you don't. Just pulling the trigger cocks and fires the gun.
I don't consider that the worst part about the Blackhawk. The worst part is the rear sight windage screw!!