No. While faster than light travel might secure the human race's survival and intergalactic presence, is the human race more important than our planet? I don't think so..
While I value human life, we're just hairless apes that are both too smart for our own good and still incredibly simple-minded and tribal. Our importance is self-importance. What is the benefit of human-kind for the universe? So far we're making existence worse for other species. We're already destroying our planet.
Emotionally and selfishly I want us to continue going, but I think our existence has been far more detrimental than neutral, and certainly far from a positive impact on nature. We're parasites to this planet, and I think a life-supporting planet is more important than the selfish and detrimental endeavors carried out by one species.
The Earth is more important than our selfish asses.
Idiocracy