And I certainly agree with you; however, the "Plan B" narrative is strong - strong enough to potentially mobilize significant financial and engineering resource

And I certainly agree with you; however, the "Plan B" narrative is strong - strong enough to potentially mobilize significant financial and engineering resources toward the cause. When the narrative states that "man must become a multi-planetary species" very few people are thinking that those extraterrestrial environments will be spartan, hostile, and (possibly) reliant on earth resources. They imagine Earth v2 - but better because science (fiction). If we're need the public to change their behavior to preserve the habitability of this planet, then giving them excuses for inaction may not be productive.