Easy now… I agree with the sentiments regarding professionalism and veracity, but if it were enough to rely upon Professionalism (with either a lower-case or capital “p”), there’d be no reason to put a warning on the form that says that it’s a crime, punishable by hefty fine and lengthy imprisonment to lie. So, yeah. There is more than one reason not to lie. If Professionalism isn’t enough to keep you honest, then be honest because you might lose your job if you’re not. If getting fired isn’t enough to keep you honest, then be honest because you might get a fine and jail time.
I have no problem with the fact that some individuals may tell the truth simply because they are afraid of something bad happening if they lie. Doesn't bother me a bit.