Not every attraction has to be packed all the time. That would make for a MISERABLE experience. You need slack.
Also - and pardon me if I’m remembering incorrectly - you don’t wait in lines, do you? That may skew your perspective.
This is a gross oversimplification at best. If Disney wanted people to use TSI it would have been the easiest thing in the world to make happen. Stick a couple meet n greets out there and the rafts are at capacity. Paris is currently plussing their riverboat in a wonderful way.
Everyone here KNOWS Disney is very sophisticated in the ways it makes crowds go where they want. Everyone here knows about weenies and which way crowds flow based on age. But when it comes to “underused” attractions, suddenly a lot of posters forget all that.
MK does not have a space problem. It has huge amounts of expansion space. It has abandoned space IN THE PARK - Stitch, Terrace, Tortuga, etc. - something certain posters (not you) keep trying to dodge. Their is NO NEED to eliminate the second most iconic geographic feature of the park, something aesthetically and thematically integral to three major attractions, to increase capacity.
Remember, Disney ANNOUNCED a massive “Beyond Thunder Mountain” expansion that would have preserved Rivers. They shifted because of MONEY.
These kind of sweeping cultural and historical platitudes are ALWAYS nonsense based on nothing.
Disney has agency. Almost everything that happens in the park happens because they want it to or, at least, they let it. The constant attempt to erase Disneys agency to shield them from responsibility is very frustrating.