Oh, there's even a saying! Well if there's a saying, surely it must be true! Wow, you really proved how delusional and out of touch with reality I am! How could I possibly disagree with a saying?
What a joke. The saying exists because liberals like saying it. Liberals like saying it, because liberals love telling people to fall in line. That's the whole purpose of that saying and the reason for it's existence. And that saying existing just further demonstrates my point that liberals are far more willing to demand that people abandon all their moral convictions, compared to the right.
I swear, you really need to learn how to think critically. Before accepting an idea, actively try to find ways it could be wrong, and do the same for ideas you've already accepted. Did you ever see actual evidence accompanying that saying? Did you ever think to look?