Nope. Not forced.
We're back to you can't do ANYTHING but walk around or shop, huh?
If you bought me a ticket to WDW for tomorrow.... That is no 60-day planning, no 30-day planning, not even 2-day planning... I would go and have an AMAZING time. That would include, at a minimum, riding all 3 headliners (SM, BTMRR, SDMT), all the mid-rides (like POTC, HM, IASW), and have some fun food.
Look at that. Even on NO planning...
Plaza is available for 5:30pm. Great time and I love it there!
TTS and CP have good times as well!
Even BOG and CRT have 8pm-9pm times for TOMORROW!
You simply do NOT have to plan else be blocked out of everywhere! Sorry. You don't.
On last minute notice, I would FP+ Space, Splash, and BTMRR, ride SDMT at rope drop, grab a Plaza lunch, and if I was going w my kids, maybe snag that BOG or CRT late dinner, then plan to stay till close and hang out in Adventureland / Frontierland and get lots of ridings on BTMRR, POTC, and Jungle Cruise. I would hit SDMT and Peter Pan first, then ride some moderate rides midday when the lines are longest. We would use this time also to get ice cream, lunch, and hang out.
Clearly everything is not booked, and almost everything is readily available!
Your argument about only being able to shop is just not the way it is.
On *no notice* and with *no planning* I could immediately come up w a one-day plan that is completely doable, to ride every attraction there, and wait in almost no lines!