"So yes, many people become very quiet when they're faced with the realistic possibility that they're going to have to defend against a libel claim even if what they said is true. Because it's all very well to defend, but if it costs $10,000 to defend a true comment, well you're out $10,000. How much is it worth?"

Source: https://ca.news.yahoo.com/libel-chill-quashing-negative-online-090000416.html

It comes down to how much are you willing to pay to prove you are right. If a big dawg comes after you its going to cost one way or the other.  You have to lawyer up or risk having a hefty judgement ruled against you.