Chartered in Royal Year 618, the Guild of Adventurers Upon Return, was intended as a guideline to deal with and control the increasing number of men and women who were taking up arms and pursuing a career in heroism and adventurism. The guild would police it's own, and function as an odd jobs mercenary corporation, subservient to the crown, and supportive of the clerics.
If a fighter has a +1 sword that only gives that plus one if he does an exhausting practice routine in the morning, he's liable to ditch the magic sword and just use an old fashioned chunk of steel. Rather than being wore out and need to rest a couple hours before he gets started just in case he needs that plus one, he could just strap on a blade and ride off without having to deal with all the issues. (From Something Agar said)