I hate them too, but to be fair, when you're levelling an alt, chances are you already have fully powered up allies and as a result your main character suffers. I main'ed a warrior, everyone is decked out in fully upgraded Myth Blazing gear, but I started leevlling up a rogue. he's 55 now, almost through myth, and his gear is complete shit because the allies carry him. But I still need to clear those raids at least once for the first-time ruby rewards. One solution is to give him gear that is farmed by my main, and I do that to some extent, but now my main is 60 already and my rogue is still just 55. So my main is doing the new raid and not getting level 55 gear.
So ultimately, I just want to clear DC and DDC once, get the reward, and then level him up to 60 and give him gear from new raid.
I agree it sucks, but the system is designed in such a way that some players are definitely going to be shit because it's an alt.