You could answer that yourself. To qualify this first ask what are the criteria for a person to establish a valid religious exemption request and then what are the criteria for a regulating body or employer to deny the exemption according to that criteria.

Here is a brief example from the American Bar Association: https://www.americanbar.org/groups/crsj/resources/human-righ...

Also, some institutions have much wider latitude to deny a variety of religious exemption requests than other due to environmental hazards and safety concerns.