Our state party had a presentation a few years ago by Cambridge....many of us felt it was SOOOO intrusive, and that people would not participate in giving up info...altho, in many cases they didn’t have to give up anything...it was already out there. I don’t think it’s rocket science as to who votes for whom....but Cambridge made it sound like they were amazingly good at analytics...which likely they were...but, as I said, It ain’t rocket science...and GOP parties generally don’t have the $$ to pay for it.
I agree with your line of thought there.
The exception would be that I think the Republican Party has all the money they want to support the things they want to support.
They just don’t care to support the things we want them to.