Well, you will always have a few people more than willing to find excuses not to do something. I have no doubt that when the first cavemen set out to see what was over the next hill, one of his friends was probably chiding him, "Why do you want to do that? Things are just fine here..", or, when the first stonecutter was shaping a mass of rock into a wheel, some naysayer was probably deriding him, "Why are you wasting your time with that, it's perfectly fine being a blocky shape."
History is probably filled with people who were timid, who "thought small", who were of a less adventuresome inclination. I say "probably" because you don't hear about them. They are ciphers in the continuum of human development. You do hear about the people and nations who were willing to look beyond their own horizons, who had a vision of the future that went beyond material comforts and monetary rewards. That is the kind of country we once were and should be again, and tell the naysayers and business-as-usual short-term profits what's-the-bottom-line SOBs to take a flying leap.