As an absolute, binary statement, yes, because it is not always true, not even close.
Hard work is only one component of success. Physical attractiveness and charisma are often at least as important, even though logically they seem irrelevant. Dealing successfully with humans is often not terribly intuitive.
It's moreso that the inverse is true. Not working hard will almost certainly not lead to success (unless your family is rich enough to where you can just "buy" more success). Working hard will not necessarily lead to success, but it's a prerequisite. The amount of work required also depends on what obstacles you're born with and degree of success is desired
