The concept of time is man-made and as such it is flawed and can be interrupted many different ways - thus neither you, or Einstein, or any other GFYer here is right or wrong
Your example also isn't even an example of "popular" time travel. A more fun example would be arguing for or against a concept like, if you could "travel back in time", could you hang out with a long-dead historical figure?
The key to unlocking everything = vibration.