When the highest offices of the land are packed to the gills with liars and grifters and anyone with a brain can observe there’s no downside to such behavior, "just be honest" rings rather hollow
Not really. I'm not responsible for how others behave; I'm responsible for how I behave. I don't like the rampant immoral behavior in society any more than you, but I still hold myself to a higher standard of behavior and others should too.
Maybe I have too optimistic a mindset, but “just be honest” in academia isn’t about being a rule-follower, it’s about not short-changing yourself by coasting though on autopilot instead of learning to think and solve problems for yourself.
Whether that really matters if your goal is to climb the social ladder and have power and influence, I don’t know.