Quite a number of newer player in my local area do not seem to know about the Guide to Organised Play and Additional Resources. (This has nothing to do with herolab)
The problem mainly stems from the fact that many are totally new to tabletop RPG and starts off with a pre-gen character. After the game, they learn about onlines sources like the PRD, d20pfsrd and nethys, and pretty much start making characters without realizing that there is an entire guide for them to read and learn more about PFS.
Of course the GMs and fellow players mention the Guide and Additional Resources, but its a "out of sight, out of mind" attitude that some new players have towards PFS. They focus on making characters without checking legality.
There are even a case or two of newer players being surprised that there is a guide.