It is not necessarily true that expensive experiments are not worthwhile doing but there are plenty of rather cheap experiments which are certainly worth doing.
“I feel that my father's greatest legacy was the people he inspired to get involved in public service and their communities, to join the Peace Corps, to go into space. And really that generation transformed this country in civil rights, social justice, the economy and everything.”
“Although when Christianity appeared the total population of the planet was only a fraction of that of the twentieth century, most of the earth's surface was quite outside the Mediterranean world, Persia, India, and China.”