Lots of the CCW instructors prefer to teach their opinions about the law than the law itself. Many of those are current or former LEO.
When I took my class a number of years ago, the Clark County Sheriff conducting the class proceeded to tell me and the rest of the class that OC was not "legal" it just wasn't "illegal" and that I could still be arrested for it.
I told him there was no law making the bologna sandwich he was eating "legal." It was not "illegal," but he might still be arrested. As is frequently the case, he failed to see the point and preferred to continue in his ignorance (and arrogance).