I know deer can vocalize, but I have never heard it in my many encounters with them. They either stand and stare or just run away. In games you can home in on them by the constant yelping.
And predators in movies waste so much energy chasing one miniscule prey, which yield insignificant amount of calories, for hours if not days. Ladies and gentlemen, Hollywood may have just discovered the first known example of an animal that exhibit autism.
Bruh, what cherry picking. Literally in the exact same movie you have velociraptors stalking prey in groups and the dilophosaurus doing their own patronizing thing. If we look to other movies, you've got Xenomorphs, you've got tremor worms, you've got pumpkin head, you've got Moder (The Ritual), you've got the Blair Witch, etc.
There're plenty of good stalking monsters in film, some of which that you don't even know are there till it's too late.
EDIT:also, we see literally a few scenes later the T-Rex come outta nowhere and grab a gallimimus no problem, so they're even shown to be decent ambush predators in the same movie.
In that scene the T-Rex is trying to flush out people which it knows are hiding somewhere as well. (Disregarding all the T-Rex specific science and just focusing on the idea of a predator screaming.)
Slow and steady winning the race. I've heard that's why we are fascinated by zombie movies. Like us they use persistence and numbers to attack their prey.
Hum... Owls and tigers know how to make a lot of noise too. We don't really know if the tyrannosaur is hunting or just trying to get ride of the people.
There are lots of different success strategies in nature and perhaps in the era of megafauna the direct approach would've been more viable. I'm not sure that we know. The depiction of the T-Rex in Jurassic Park is pretty out of date in general, but it's also from over 30 years ago.
They are getting quieter though, and there's concern that they may evolve to lose the rattle entirely, as the loudly rattling ones get sought out and killed off.