The ST actually has much more CGI than any of the PT film; the issue is that CGI of that scope back in the early 2000s was widely unheard of. As such there was a lot of growing pains and ILM was still trying to figure out how to properly work with the technology and make it look convincing. So all these practical effects, sets, and real locations get overlooked because the CGI at the time just wasn’t 100% ready yet. Not saying that magically makes a lot of the CGI good, just that there is a reason.
But that’s also a problem with the decision making. If the technology isn’t ready, you don’t use it. Or you think it is ready and it’s not and you’re just fooling yourself.