This is ultimately a discussion on semantics, but overall DPS and primary DPS are not the same. Yes, Genji has pitiful primary DPS. That's why his effectiveness is tied to the skill of the player chaining his abilities together. Reflect has no DPS, but is one of the better abilities in the game. Dash technically has a DPS of 6.25, but that doesn't take into consideration the resets.
Moira has really, really low DPS, and low-to-average DPS in the occasional situation where she is 1 v 1 in a room where her damage orb is actually sticking around. If she's caught in a situation without her orb, or if the orb takes off like 20 health and then flies away uselessly, then it's back to low DPS. Primary DPS is a statistic that ONLY considers these things: a damage-dealing function that is effectively always available for the character to use. Your left-clicks or R2's, if you will.
Sustained long-term damage means nothing in OW because this is a game where burst damage and positioning rules all. In what situation will Moira be allowed to melt down a Reinhardt, which takes at minimum 10 straight seconds of her using her primary DPS or 5 straight seconds IF the damage orb is constantly attached to the Rein? That will never happen. You kill a Rein because you explode his health bar, or you kill his healers first, or you find him in a shitty position that he can't escape from. The same goes for literally the entirety of the rest of the cast.
Moreover, her 'lock-on' is quite pitiful. As I've stated before, her beam is closer to Zarya than it is Sym. So if you're jumping around, you're lowering your own DPS. The 33 HPS gained is not enough to balance out a real 1v1 against a DPS character.
So no, Moira's damage is at best adequate and at worst unimpressive, and does not warrant a nerf, because there's nothing bullshit about it.