RidgiteGolfer: What is the reason we can not do stroke play on Pebble Beach or Wolf Creek, but we can play closest-to-the-hole stuff?
It is either a question of investment of time and money to map the entire courses, or a question of licensing and other commitments.
Last year, when the US Open was at Pebble Beach, we were given the full course at Oakmont instead, probably because there was some licensing conflict with respect to Pebble Beach (?). Presumably the full Pebble Beach will be put up in time for the next US Open there (2019, I believe).
WGT has also explained that some courses are physically/technically very difficult to map, which could explain why the full Wolf Creek is not available.
Also, because of WGT's arrangements with the USGA, the first priority is apparently to bring us Congressional, this spring, in the runup to this summer's US Open.
The reasons could vary from course to course.