Robot like consistency, and most of us haven't got it. Check out the RG scores and see who are at the top of the earnings table. You will find that unles they WD (lack of consistency - a blip) the top players finish in the top 6 or 7 of each RG they enter. And sometimes it is with a 31 or 32.
Many of us score 31, 32 occasionally and pick up 100+ credits. Heck, we even score a 30 or 29. But we ofen post a 34/35 or 36 and that means we haven't concentrated or we have been really unluck with the putts.
The best players put the putts in from 20 feet most of the time for that birdie or eagle. The rest of us are content to leave a 1 footer for Par. That's the difference.