A light weight profile precision barrel will be more accurate than a run of the mill HBAR, the weight of the barrel profile adds nothing to making it a straighter bore, optimized chamber leade, centered coaxial, or the optimum length. My point is that too many jump on the LOOKS, without understanding the TECH, and make bad buying decisions. The average consumer can't possibly know the tech - they're AVERAGE. Maybe a couple of semesters in college, NO technical training, watch "This Old House" to learn about putting up sheet rock, "After the piece is cut to size, place it against the wall and fasten it to the studs with nails or screws."
Note, they had to tell them about the studs.
Americans are HORRIBLY ignorant about what makes things work, or why, and the heavy barrel buyer is usually persuaded to get one thinking they get more accuracy. THEY CAN'T SHOOT GOOD ENOUGH TO FIND OUT. It's bling, social oneupmanship, I've got one and you don't, my 3/4 dually diesel is better than your little commuter car (and they both work in an office a mile apart.)
Heavy barrels just mean the maker dressed up the rough cut dimension and didn't profile it to a lighter shape. Less machining = higher profit.
And some people line up for that. Clueless.