Everyone is replaceable, this goes for man or woman. Having said that, most women put forth a relationship (family) as their main mission in life whereas a man (if he is honest) will probably put a bigger calling above a relationship. So, I would say a breakup (all else equal) is more difficult for a woman.
Minus the fact that most reasonably attractive women can walk into the same bar you’re at with your friends the very next day and take the taller guy 5 ft from you home in about 10 seconds flat.
So was Grexit. I should be an Internet Detective. Just like Magnum PI only without the awesome car, huge house, living in a tropical paradise, interacting with real people, and amazingly handsome looks.