That’s why I’ve always struggled with people who believe in aliens. They can never explain space travel of millions of years.
Why should they have to? The Theory of Relativity is only 111 year old. Don't you think, in even another measly 111 years, in 2127, we might have surpassed it in our understanding? How about in a thousand years?
It's not technology that will create FTL travel - it's the longevity of technological civilization. If we can just keep from wiping ourselves out long enough, we'll find the way. So the idea that someone else beat us to it isn't so far fetched, when you consider the vastness of the night sky.