Because that would be to deny without any reason but empty speculation that what a small group of scientists have done in the past 300 years is a singularly impressive achievement, adding more to human understanding of the universe than far large groups have done over far longer spans of time.
People don't know very much aren't impressed by what the discipline of publicly testing ideas by systematic observation, controlled experiment, and Bayesian inference has taught us about the world, and they radically under-estimate how much we know, instead comparing the vast and wonderous extent of our actual knowlege with their own fantasies of what might be known one day.
I look back at the science of the 1800's and I'm impressed by how much they knew, how much they did. I expect scientists a century or two from now will look back and think the same of us, while the ignorant people of their day will dismiss the thoughts and judgements of scientists of that time as nothing much compared to the fantasies of the ignorant.