I do not believe for a moment that any editors put shops on hold or request replacement photos for the purpose of asking for a new photo. Editors get paid per accepted shop. The more time they spend contacting the shopper for corrections, the fewer reports they can pass on to the client - and the less money they make.
No editor is going to return a shop if they think it is going to be approved. They might have a higher standard than needed, but it will not be purposeful as they just want to make money like the rest of us.
Hard work builds character and homework is good for your soul.