You might know a few martial tricks from before you joined the keys, but the majority of your learning since then has centered on how to avoid danger, not tackle it head on. You are largely self-sufficient (at least while carrying out a job). When you do surround yourself with allies, you appreciate the help they offer but can easily grow weary of their inability to keep up with you.
Before the end of the Last War, most silver keys stayed in the service of House Kundarak their whole lives. With the advent of the new age of exploration, many keys take their leave of the house to embark on adventuring careers, and whether you remain a Kundarak agent or go independent, you know the house will respect your choice. In the end, new recruits for the keys can always be found, and rumors of a group of elite break-and-enter specialists spreading across Khorvaire makes an effective selling tool for Kundarak security.
Only loyal dwarves of House Kundarak are ever inducted into the ranks of the silver keys, but deep involvement in house affairs is optional. Any house heir who has proven himself capable and loyal stands a good chance of being accepted. Much of the business the house receives goes out to the keys, since even magical warding operations are typically undertaken after a key has done the preliminary mechanical work.