this is false. Nothing is ever easy in court, and invalidating patents is especially so-by design. There is a presumption of validity that attaches by law to every issued patent. In layman's terms, that means that the deck is stacked against anyone who tries to invalidate a patent in court.
Further, validity in court is decided in two parts. The first part is when the judge - a 50 year old who did history or poli sci undergrad - "construes" the claims by deciding what they mean. This frequently leads to some marvelous interpretations of terms. At least the judge has a college education and tries to get it right.
Next, the "facts" about how the patent claims apply to the accused technology are determined by a jury. Distressingly often, this jury is in East Texas, where there are two undergraduate degrees and ten people who have ever used the Internet in the 100-person jury pool.
You think I'm kidding. Or exaggerating. I'm not.
I have often thought that I could write a legal thriller with a helping of Dan Brown-style "all the facts and cases discussed in this book are real." people are astounded when it is explained to them.