Say what? I've always followed that course of action, and so far - knock on wood - I have not been fired for it. And that spans about 25 years.
If what you believe in and what the company believes in are not aligned, you realize that usually well before there's any talk of firing. Just go look for a new job that is more aligned with what you believe in.
Its the challenge of the argument in the large vs the argument in the small. Specifically not everyone has taste.
I have met people who follow this mantra and have been fired repeatedly, I know folks like the one in the parent who have operated this way their entire career and have been quite successful at it.
Think of it as the "Don't try this at home" admonition. They say that because not everyone will understand both the risks and the implication of the risks, not because as reasonably cautious and intelligent person could not pull off exactly the same stunt "at home."
As with all things, if you find yourself getting fired a lot for doing the "right thing" in your estimation, then its time to take a look at your compass.
If what you believe in and what the company believes in are not aligned, you realize that usually well before there's any talk of firing. Just go look for a new job that is more aligned with what you believe in.