No, absolutely not! This is a complete myth.
At Dash of Lash many of our clients regularly refill their lash extensions every 2-3 weeks and experience no breakage. It is extremely important to have your lash extensions applied by a qualified lash stylist who only uses quality products. The eyelash has a cycle that is constantly being replaced just like the hair on your head. That is why you always found fallen lashes on your face. (And yes you can still make a wish on your fallen lashes)