So switch to DKP, if it's faster? lololol
I like to know that the time I've invested into raiding will eventually pay off. I also know that somebody who has invested a lot less, if at all, won't take something away from me, or anybody else, just because they are luckier than me. And you see this happening a lot in PUG's where the "carried" people rolls the highest and a lot of people start crying how the winner didn't deserve it.
Since the roll enthusiasts won't ever accept IRL comparisons of investing, or any for that matter, I'm not gonna bother explaining it any further to these gold (read: loot) diggers.
Loots aside, DKP system encourages activity over randomly appearing/disappearing. If activity is something you can't get into, for IRL reasons, you should talk with your GM and work things out. If you can't do that, you should be happy with what you can do, when you can, whether it's PUG or guild raid.
There were times when I only ran with PUG's, because there were no matching guild raiding times to match my IRL schedule. There were a lot of people who had lost the plot, had no clue, slacked all the way through the raids. Where the mentality is "If I don't do it, nobody else will; I should do it, as nobody else seems to know how", and you've certainly ran into PUG or two, which were like that. Every single raid I wished I'd be in guild where DKP is used, knowing none of the awful players would ever get loot. Which isn't always the main point, sometimes you just want good and enjoyable raids.