Umm, you do see in the exemption the words not preclude right? That being an officer or military member or any other of those other exemptions won't preclude a felony possession from section 265.01. Meaning you can be a cop and still have a felony firearm charge.
That's not what the law says at all. It says so long as it will not preclude a conviction on subdivision 3 of 265.01, which reads:
(3) He or she knowingly has in his or her possession a rifle, shotgun
or firearm in or upon a building or grounds, used for educational
purposes, of any school, college or university, except the forestry
lands, wherever located, owned and maintained by the State University of
New York college of environmental science and forestry, or upon a school
bus as defined in section one hundred forty-two of the vehicle and
traffic law, without the written authorization of such educational
institution; or
Just stop digging.