Science tries to exorcise them. The ones that cause most trouble are the hidden assumptions - Bacon's idols. They are hard to recognise in prospect but stand out like beacons on a clear night once they have been rumbled. A religious fervour for a particular belief in science is an anachronism. Such belief drags an unwary discipline to the precipice of a Kuhnian revolution.
Heresy is good for all disciplines - it provokes open debate and exposes the weak links.
The truth is a bankrupt resource in science. An extreme example of this is the following. Say the truth was that god created life in just the biblical way that fundamental Christians believe. Let's go for the power and leave the truth to fend for itself. Major scientific advances tend to take us from parochial to more universal perceptions.