LOL. GMAT is not an indicator if you can or can't handle course work
How solving high school math and doing English grammar test your leadership or management skills?
So that's your first giveaway that it is a completely fabricated point.
For the top schools or any schools score age hardly matters however, since it is a side component of the application, so for HSW it likely does not matter at all since they don't care about the score and it is more of a pass/fail and really don't care if you have a fresh or stale score. It is about your application and your career trajectory and what you have been able to achieve. It is possible you can only get a 690 because you were in an adverse environment and it would be valued more than a 750 for someone who had all the resources in the world.... it is about your accomplishment rather than just a number.
P.S. Whoever is saying that is really not your friend and not someone you want to listen to.