Originally Posted by
Katchii
Someone who has become a thief has learned over a period of time how to operate as a thief, learning the skills, knowing when to strike, the art of stealth, etc... In regards to this game a level 1 character is an inexperienced noob who knows nothing, so it wouldn't make much sense for a level 1 character to be a thief. They could be a "thug" or whatever (highwayman, cutpurse, Scout, etc...) and at level 30 they get a calling card from the Thieves Guild, which then trains them on the iconic abilities.