I feel, for certain guns, (and certain people) a light trigger is not an issue. But for most guns, most shooting (and most people) a trigger in the extremely light (2oz?
) is not suitable and can be dangerous.
My pet Ruger Blackhawk, 7.5" .45 Colt, has a 12oz trigger. Thats right, 12oz. I did it, and I have been shooting that gun for 29 years without a single mishap, or malfunction. This set up certainly isn't for everyone, but it works for me.
I consider it safe, because I know the gun, and being single action, its never cocked until I want it cocked. I shoot it offhand, one handed, mostly, and at targets to 200yds. I don't always hit the small ones, but I miss pretty close.
I wasn't trying for 12oz when I was smoothing up the gun, I was just working for a good feel. I got it, and surprise later measurement said 12oz. Which is why I don't do trigger jobs for other people!