Why do you all like dazzling ray so much?

Assume you have 18 cha and 16 secondary damage ability (yes, I know you have 18&18 or 19&18, but that does not help dazzling ray on this one!)
If you hit with dazzling ray, you deal 6d6+7, that's 28 damage on average, and only half if you miss...
If you take Dragonfang Bolt instead, you can target two creatures, you do 2d8+7 damage to each, that sums up to 32 damage on average and on hit you deal 5 ongoing damage (so if you hit it's 42 damage actually). And you deal full damage on miss!!!
For each damage point you get from weapon and increased ability scores you actually get two!