Not everyone's body style and choice of clothing will accept a good conceal pocket carry.
For most heavier built people, Pocket carry is great, but for a slim built person who wears slim fitting pants, jeans, etc. pocket carry will only work if printing is not an issue.
I carry a Kimber Ultra carry 45 ACP, in the pocket, and it is undetectable with shorts or jeans, and without anything covering it. like a shirt or jacket. There is noting more advantageous than carrying in the pocket for defensive carry.