Yes but this is an entirely different game to Tiger Woods isn't it? WGT actually go to the courses and take thousands of photos and intricately map the course to make it as close as possible to the real location. It's expensive and time-consuming but as far as I'm concerned the results are excellent and help make this game unlike the others.
Course builders? No thanks. There are other games out there with course builders and then myriad of fantasy courses and oddly rendered vistas that come with them. I totally get that you want more courses here, and so do we all. But I like WGT precisely because it isn't TWO or PP or any of the arcade golf games that have more variety and less realism.
What you are asking for would increase the quantity and decrease the quality of this game in my opinion, so that gets a thumbs down from me.