I never said that. I said it did more damage, which from everything I've seen, it does. I've said Chakram hits twice...I've also said it hits 4 times. I've even seen it hit 6 a handful of times when the stars aligned on monster movement.For example, you stated that ball lightning hits twice, which was why you preferred it over multishot.
Volleys of multishot don't kill things for me. Volleys of other skills do. The other skills also cost less, and are much more flexible in their application (since there is only 1 viable rune for Multishot, where the others have at least 3). This isn't opinion.
Here's an opinion: People are clinging to multishot because they have fond memories of their bowazon, and don't want to give that up. I had this issue myself with Strafe in D3. Strafe was always my favorite D2 skill, and I wanted it to be good now as well. But it's terrible, and when I really looked at it, I realized that it is terrible and moved on to greener and more death-inducing pastures.