I hear what you're saying about Trump and policy statements, but the devil is in the details.
In your immigration example, he's never clear on how he will actually round up illegal immigrants or those in America under protected status.
When asked about the healthcare plan he would implement if he's ever successful in removing Obamacare, he's said he has "concepts of a plan."
When asked how he would end the War in Ukraine, he said he has a secret deal.
I could go on. The point is that I think you're giving Trump a little too much credit about being forthcoming and clear. While I agree with some of your assessment of Kamala Harris' word salads, Trump is similarly at fault, albeit in a different way.
Instead of a word salad with standard tomatoes and lettuce, he uses jalapeños and habaneros.