Einstein was a genius in his time, no doubt about it. But who knows what the future holds.
People used to believe Earth was the center of the universe. Then Sol was the center of the universe. The sonic barrier could never be broken.
Admittedly getting around the speed of light problem is much more difficult, will probably take hundreds of years, or thousands, or maybe even millions, to solve. But I hold the belief that we are not meant to be stuck on this third rock from the sun forever, or within a radius of several hundred light years of earth for that matter.
Maybe Homo sapiens will not be able to accomplish this goal. But we will try, that's what being human is all about. Maybe our descendents from the next stage, or the second next stage, or the third, and so fourth, stage of human evolution will be able to accomplish this. Or maybe they will not be able to.
But who cares, as long as we try. Or perhaps our lineage is doomed, and it will take a whole new species to accomplish this goal.
But whatever written records the distant future will have of Homo sapiens and our descendents will that we tried to crawl out of our cradle.