Bringing space back to the 1970s to develop rural areas

What? Traveling back from the apocalypse to the old days to be cannon fodder for the love story of the hero and heroine? Or the hero and heroine being running dogs for the enemy agents? Is the author's brain full of shit? There is gold everywhere, great opportunities at your fingertips, why bother with love, isn't it better to develop and make money? The number one "big villain" targeting the hero and heroine? Saved! Their big backer? Moved! The heroine's chance of glory? Taken away! Can't kill her? Then I will incite you to fight each other, and those who want to bring disaster to my Dragon Country will destroy themselves. ...