I simply struggle to believe that people who enter Rise's line become hostages to the sunk cost fallacy and every single one would refuse to leave even if the ride goes down, or that Disney would not simply dump the queue should the ride in fact go down. I think Rise would be the only ride on property to regularly post 150~180 minute standby waits, and I think it's fine to give people the option to choose to wait that out.
I don't believe in the common refrain that "people would just get in line for 10 hours and do nothing else and be mad about it" - there are simply not enough people rope dropping and not enough people entering the park at posted open to fill the queue to 10 hours by 9:25 AM. Even if there were, exceptionally long waits are their own deterrence and I struggle to believe that there are enough diehards who are unable/unwilling to arrive at the park early to stretch to the line to even 4 hours, nevermind 10+. Even if there was somebody who waited in line for 4 hours only to find the ride goes down just before they get on, they both still have the rest of the day to do other things and could be taken care of by guest services granting compensation commensurate with how long the line was and how deep into it guests were at the time.
Personally, I like the boarding groups - in theory. The lottery issue is largely due to the fact that there is zero commitment or time investment needed to attempt to join the queue as well as due to roughly half the queue capacity being made available immediately. Those are both resolvable problems: the former by requiring you to physically be present at the ride when the queue opens (with the rest of the park instead of at 7) and the latter by only releasing boarding groups in waves of 5 on the hour plus an additional boarding group whenever an already called boarding group is fully processed (essentially allowing more seats to become available randomly throughout the day.)
But it irks me when the argument is made that a physical standby queue would also somehow be instantly 10 hours long 7 seconds after opening. It doesn't work that way. It physically cannot work that way.