But thats just it... by acknowledging you need to apply the knowledge you should show up early... you acknowledge that using the posted time alone is inadequate.
The changing of time or not is irrelevant to that because its not necessary for the person to fail for simply following the time.
People who followed reasonable disney experience with special events and park opening were just fine on opening day.
Simply put... we know visiting disney comes with its own set of expectations. Anyone who doesnt think so, let me know where you are eating 180 days from now.
Again, no. Your example would be valid if you, for example, left your hotel room at the Polynesian and 8:30 for a 9pm show, but didn't factor in the monorail being a disaster and lines at the turnstiles. However, Disney was explicitly telling guests that you want a chance at a boarding pass just be in the park by the posted park opening time.
They explicitly stated no boarding passes would be available until 8am. That's it. That's the deal. Plan your morning how you want, just be past the tapstiles by 8am. Whether that means arriving at 4am or 730, just be in the park.
What sucks is that people are doing everything Disney has asked, and more, by arriving early. They're in the park, excited they made it. Alas, they found out that despite Disney telling them explicitly that no boarding passes would be given out prior to 8am, they were all given out by 7:20am. That is deceitful, at best. At worst it's an outright lie.
It's like saying 4 front row tickets to Hamilton will be given out at 5pm and you must be present for your name to be called. So you trek all the way to Times Square, grab a coffee and make it to the theater by 4:30 to snag a good spot, only to find out that they did the raffle an hour ago and you lost by default for literally no reason. "Why'd they do it early?," you ask an usher. "No reason really, just looked like a lot of people had gathered."