The issue with that is, apparently, the PGA Tour won't let that happen. Getting the PGA Tour license meant that 2K21 had to release without Solo Societies, which was basically a way you could build a customized career mode in previous The Golf Club games. You could rename the AI players and customize their skill, add in whatever courses you wanted to the schedule, and name the events whatever you wanted.
As soon as 2K/HB went all-in on the PGA Tour side of things, Solo Societies were given the boot. And I understand why, but I feel that's a major reason 2K should actually drop the official PGA Tour licensing and embrace the customization side of things - especially after seeing how little they apparently care about creating a working, immersive PGA Tour career mode.