The AI's proposal is even more of an "IP for the sake of IP" attraction, it's just "ride in a wagon with cartoon eyes while Lightning McQueen is there", it's like they took a western ride and slapped Lightning in it. Heck, it just sounds like exactly what we're getting but you're riding in a wagon instead of a car. AI is just taking random ideas and mashing them together, anyway. It's the antithesis of creativity.
You can claim Imagineering is "creatively bankrupt" but the reality is that Imagineering isn't in charge of what goes into the parks anymore. It's up to corporate to decide what gets added based on what they think will drive ticket, merch, and food sales. Imagineering gets told "do this for us" and they try the best they can to make it work. Iger gives them lemons, and they try their best to make lemonade.