People who REALLY want to understand the universe and the way it works have the drive and courage to risk the gloom and doom prophesies put forth by those who are satisfied with the fantasy that God is some guy in the sky that can work all these wonders with the snap of his celestial fingers. The scientists are the true believers.
The defenders of religious dogma will do anything to throw trip-ups and roadblocks in their way because of intense fear that what is discovered is liable topple their house of cards and consequently whatever power they have amassed thereby.
The scientists look so deeply because they know in their hearts that there has to be more than there appears to be on the surface, that we must be more than the random collision of atoms and cellular dysfunction and mutation. They do so through heroic effort and countless man-hours and monetary expenditure. They do so all in the effort to know that we are as we have expected, made in God’s image and to finally be able to congratulate him on a job well done.