And I don't understand how FP makes the line longer for others - do they not have access to it? This make no sense.
But, these are the ancient arguments on FP and we can go round and round in circles on this... so I'll give you the last word as I bow out.
I know you are opting out of this argument, but I am going to respond anyway for others who are reading.
It doesn't reduce the amount of attractions others can experience, if they, too, make the effort to fully utilize Fastpass. But even then, in the end, you are not riding
more with Fastpass than without it. That is the illusion Fastpass creates and why people are in favor of it. Instead you are doing
more work to ride essentially the same amount that you would be able to ride if it didn't exist.
Ride capacities are fixed. There is no way to somehow increase their capacity and how much everyone can ride in a day. What Fastpass does is change
how you wait.
In my previous post I mentioned why the myth that "if everyone were just using one line it would be the same wait time anyway" is wrong. With 80-95% of the ride's capacity being devoted to the Fastpass line, you are letting a higher number of people "skip" in front of you - in addition to the people that are
physically in front of you - than would ever be possible with one solitary line, in which the number of people who will ride before you is fixed when you enter the queue.
Its also worth noting that the distribution of crowds, as well as the number of Fastpasses distributed, is quite different than when it debuted in 1999. In the early days, remember how they were generally always gone by mid afternoon? Today you can still grab a Fastpass for Space Mountain 90 minutes before the park closes. At midnight. Why? Because when there is demand, enough Fastpasses are distributed that the Fastpass line is now the "normal line." Add in the well documented
GAC Abuse and other forms of scamming and abuse, and more people are entering via the Fastpass queue than ever before. You aren't bypassing the normal line. You're scheduling a time to use the normal line.
This will go in circles because having a Fastpass and walking up to an attraction and riding with minimal wait will always make people happy, but seriously ask any Cast Member that has ever worked a Fastpass attraction, be it college program newbie or ex-imagineer, and they will tell you the exact same thing. They'll also tell you that it creates a staggering amount of negative situations in the parks. And not just the typical "man, people are stupid!" hyperbole. More than any other single solitary thing at WDW, Fastpass is directly or indirectly responsible for the majority of complaints in the parks.