I am not so sure about that. Like you say, space is big and the particular spiral arm of the galaxy that our little G2 star resides in is not very densely packed with other stars.
I do not consider the speed of light needing to be exceeded. Scientists have considered for some time the potential for going "around" the light barrier.
That sort of thing however is not going to happen in our life time. Meanwhile humanity has a whole solar system to explore and colonise. That will keep us occupied for quite some time.
I liken the 20th-21st centuries to be like the 15-16th centuries. First exploration and then colonisation. But achieving that is not going to be possible for one country alone. A united approach is needed.
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