For me anyway, guns can be too light for me to shoot well. I bought a 28 ga RBL with 28" barrels from an estate. I was pretty excited. I'd read good things about the RBL 28 ga. Took it dove hunting and couldn't hit squat. Too light, especially in front. I have no idea what it weighs. But I know it's too light for me. YMMV
I used to think so, too. But, then I was given a .410 that has the mass toward each end rather than in the receiver. I can't remember the exact weight of it, but it is somewhere around 4# 13 oz. Rocketman may know, he spun it several years ago and recorded it in his data base. It handles like a much bigger gun. I shoot it really well in spite of it's very light weight.
Weight alone is not what determines handling characteristics. Distribution of that weight
IS what determines it.
SRH