This.
People are lining up for the ride. Whether it is structured to get a VQ number, or, to physically fast-walk to the ride and get in the standby line, it's basically the same thing: they are lining up for the ride. And there are more people showing up than the ride can accommodate.
So, whether the line starts at the standby line, or at the tapstile, or at baggage check, or in the parking lot, or parked along the highways... it is still a line.
And unless you're in the front of the line, you don't get in. And your attempt to get in has now become a big waste of time.
So, what do you do? Well, tomorrow, you show up earlier. And if you didn't show up early enough, you show up even earlier the next day.
And several thousand people are doing the same thing to compete for the front-of-line (no matter where it starts). So you show up at 7 AM, then 6:30 AM, then 6 AM, then 5:30 AM... and so on.
All the while Disney is advertising an opening time. Which doesn't matter. Once several thousand people are being held either in the hub, or at the tapstile, or at baggage check, or in the parking lot, or parked along the highways (or circling in a giant traffic jam), well, Disney's going to let them in. Even if it's hours before posted opening.
So, there's no pain involved in showing up two hours before opening. There are enough people doing the same such they you'd only have a half hour wait before Ops freaks out about an uncontrolled mob and lets you in.
So, you show up three hours earlier. To beat everyone else. And everyone else is doing the same.
At least, the VQ is telling people that they're not getting on, so, they don't waste their time on a 10 line (unless the show up at 11 PM the night before and camp the park entrance). But the 10 hour line did have an advantage for Ops in that the pain of such a line turned people away. The very early morning race to be first loses any painful penalty if Disney opens up early for them.