It means the business can't practically be sold - if you buy it and have to spend all the profits on someone to manage it, you make nothing for what you've spent. You could buy it and manage it yourself, but then you're effectively paying a significant amount of money for a very difficult job - might as well just go get a job for someone else.
That ultimately means that the business itself isn't worth anything, so when the owners decide they don't want to manage it anymore, it'll likely just have to fold.
That ultimately means that the business itself isn't worth anything, so when the owners decide they don't want to manage it anymore, it'll likely just have to fold.