I'll admit that some of my energy towards the situation is fueled from nostalgia and personal attachment to the attraction, it was a ride I really loved when I was younger. However, I do think there are still a lot of thoughts and opinions I have that make me so opposed to it's removal that are legitimate and stand on their own merits outside of pure nostalgia.
1. I believe Dinosaurs deserve a notable spot within DAK.
2. I don't believe everything in a theme park requires min-maxxing to become the most profitable, well-attended version of itself. We'd lose a lot of great, fun, and even historic attractions if this idea fully takes hold.
3. I don't believe every ride should require an IP grafted on. Dinosaur has one thrown onto it already, but the IP is so niche and the makeover so invisible no one even notices. There is a massive difference between that and Zootopia/Indy taking over.
4. I think the ride is very fun and well-made. It's unique among any other Dinosaur-themed attraction on Earth, besides maybe Jurassic World Adventure which I only know the one big chase scene. (I personally try to avoid spoilers for rides.) Going through an actual prehistoric jungle and speeding away from chasing Dinosaur's in a car is a really cool ride concept that you can't get on JPRA or Velocicoaster.
5. I don't believe the Disney Parks should have to lean away from edge and scariness. Some of the best attractions in WDW history have leaned into that to great effect, (ToT, Everest, Splash Mountain). Despite that, since Everest the Disney Parks have leaned 100% into whimsy. There's only been one relatively thrilling or scary experience at WDW since the 2000s and that's RotR, which is one of the best rides in the resort. Splash seems to be removing the scary drop for a more celebratory fun "Dig a Little Deeper" scene, which is fine in it's own right, but it's simply less interesting to me. I think scrubbing the tension and scariness of Dinosaur and turning it into Indiana Jones' whimsical danger, the same as GotG:CR or FoP has just makes everything more one note and less interesting imo. And a Zootopia ride would be leagues worse for that. If they plan on making more whimsical rides going forward, I would love to just keep as much of the 90s/2000s edge as possible.
6. I think in a park that has a net 7 or so rides, Disney shouldn't be worrying about replacing things as much as expanding and building onto the resort they've already got.
7. If they want to replace Dino-Rama, the Institute is tucked away enough from it that a Dino-Land replacement could skirt around the building a la E.T. for DreamworksZone without much issue.
8. I very much am opposed to Disney Parks on the whole becoming more homogenized. I want to have a reason to go to Disneyland, Hong Kong, Paris, Shanghai. I think on the whole, I'd rather have a less good but unique attraction than a great clone.
It won't make the most business sense to keep Dinosaur around by any means, but when have fans ever needed to worry about the bottom line for the Disney CEO's to care about a ride they really enjoy? Like I said before, that's the kinda thinking that'll get us Doctor Strange's Hollywood Tower of Agamotto in DHS or whatever. Dinosaur is a really interesting original attraction that really is unlike most things Disney has ever made, and it'd be a real shame to me to see it torn to shreds forever, in order to install something you could buy a ticket and ride at Anaheim or Shanghai already.