To the best of my knowledge, "Mistrip" isn't a word (and certainly isn't a word that ought to be capitalized in the middle of a sentence), so I'm not quite sure what that means. Beyond that, I think what you're saying is that a rule applicable to flight attendants is not also applicable to pilots and gate agents. Correct.
Yes, it is perfectly legal for an employer to treat employees differently based on what their jobs are.
These questions raise no legal issue (except to the extent that the issue may be the subject of a union collective bargaining agreement, the terms of which we are not privy to).
I completely agree -- no insult intended, and any perception of an insult is downright silly. If you don't like how your supervisors do things, you're free to seek employment elsewhere.

