It’s part of a larger commitment to the belief that materialism will one day refute dualism by explaining away all of the apparent immaterial aspects of the mind:
Neurosurgeon Michael Egnor has contributed a chapter of The Comprehensive Guide to Science and Faith: Exploring the Ultimate Questions About Life and the Cosmos (2021): “Have science and philosophy refuted free will?” (Ch 18) and “Can materialism explain human consciousness?” (Ch 19). In it, he notes a reality of modern neuroscience: Materialism (the mind is simply what the brain does) is not a discovery so much as a pledge of allegiance:
News, “Why so many neuroscientists are unreflective materialists ” at Mind Matters News (November 19, 2021)

One might think that the logical problems with materialism would insulate 21st-century neuroscience from its influence, but that is not so. Most contemporary neuroscientists work from an implicitly materialist perspective — in part because they’re unreflective, in part because materialism is the metaphysical correlate of the atheistic scientism that infests modern science, and in part because public admission of a dualist perspective is perceived (correctly) to be a career impediment in neuroscience. I recently had a friend (a tenured and accomplished neuroscientist) who is a devout Christian tell me privately that if he ever publicly questioned materialism, he would never get another grant.
MICHAEL EGNOR, “DUALISM AND MATERIALISM IN MODERN NEUROSCIENCE” AT EVOLUTION NEWS AND SCIENCE TODAY (NOVEMBER 16, 2021), P. 215 IN THE BOOK
Takehome: In his chapter of a new anthology, The Comprehensive Guide to Science and Faith: Exploring the Ultimate Questions About Life and the Cosmos (2021), neurosurgeon Michael Egnor looks at the growing evidence that the mind is not simply what the brain does and defends a dualist view.
You may also wish to read:
Dualism is the best option for understanding the mind and the brain. Theories that attempt to show that the mind does not really exist clearly don’t work and never did. Neurosurgeon Michael Egnor reviews the mind-brain theories for East Meets West: Theology Unleashed. He think dualism makes the best sense of the evidence.
and
Trying to disprove free will shows that materialism doesn’t work Michael Egnor: If you have a metaphysical theory and it contradicts science, logic, and everyday experience, then your metaphysics should be abandoned. To deny free will, biologist Jerry Coyne tries, once again, to defeat the implications of quantum mechanics, neuroscience, and logic.