It is bad for the species to have fewer people. It's also bad for the production of novel art.
How do you define "easily"?
Sorry, I'm asking two questions that each deserve comprehensive answers.
Ah, there are other possible paths. 1) Extinction (which has happened to many species) without any evolutionary successors. 2) Artificial life (it evolves without us). 3) Something else evolves (long after we are gone) and becomes the dominant species on the planet.
Humanity has limited options, but nature doesn't and we can't count on it doing us any favors.