Health: Owners of summer camps make a huge investment with awesome potential for loss. It is easy to wipe out a life’s savings if a business the size of a summer camp were to fail. I certainly don’t begrudge them their profits.
You say “most owners I see don’t do any work”
Are you serious? How many millions of dollars do you think it takes to supply the original capital for a camp? Do you think the owners printed it in some basement counterfeiting shop? They worked for it!
If you don’t see them actively working on the camp, it is because they are wise enough to delegate tasks to those who are best suited to perform them.