I didn't really think about it until you posted this but if there are 100 people per boarding group (I have no idea what the number is), only around 11k get to ride each day. When the park is at capacity with reservations there are a lot more people in attendance than 11k. I've been fortunate to get a BG both times I've been to DHS since reopening and hope to make it 3 for 3 in January.
I have to criticize management and/or imagineering. Designing a ride that is rideable and desirable by at least 90% of guests that doesn't have the capacity for everybody who wants to ride to be able to one time in a day is bad practice. Even post COVID when the ride vehicles aren't capacity restricted, there is no way that everybody in the non-reduced attendance will be able to ride.