I watched the video again and found it entertaining, but really this issue is not so difficult.
Your doctor's offices and restaurants effectively use a fastpass (free appointment) setup. Some even take standby patients/walk-ins while some don't. Most places are setup like that because it minimizes # of patients in the queue and time spent waiting. They especially don't want people to wait in a queue, but end up never seeing a doctor or getting seated at the restaurant at day's end. If this free appointment+standby system didn't work for WDW, it is not because it was broken, because the basic appointment+standby setup works EVERYWHERE ELSE. It is WDW's implementation that is botched. Check out TDL/TDS - they even have a raffle/drawing system for shows to keep things fairer when demand outstrips supply.
WDW's FP+ implementation gave 3 FP+ 60 days ahead, then once you spent 3, you get more. People game the system and standby too long? Stop giving out more after 3. Standby line too long during early morning rush? Only give out FP+ to quieter time of the day to flatten out the curve. Need to save room for nonplanning guests? Give out only 1 or 2 FP+ and save 1 or 2 for people who didn't reserve. The possibilities are endless.
Now if WDW decided to let too many guests into the park, that is not something that can be fixed by tinkering with appointment and/or standby. Nothing will fix too many guests until there are more attractions, i.e. adding more doctors to see patients, more tables at restaurant, etc. In real life, no sane doctor's office or restaurant will let more and more people to line up on standby, like WDW "increased capacity" but knowing they've not hired additional staff or setup more tables (equiv. to WDW holding ride capacity/hour x # of rides constant). I pay docs and restaurants plenty of money, and literally none of them screw up their capacity management so consistently. Only at WDW, would people accept getting told that free appointments ahead of time are unfair and paying more to cut in front of fellow vacation-goers is a better way forward.