If you are a plaintiff writing a complaint, an interested party writing an amicus brief, a legal scholar writing a law review article, and so on, then indeed the right wording is copyright infringement and arguably "that's it".
If you are speaking outside of a formal legal context, than it most certainly is not the case that "that's it". In ordinary English, we overload and generalize many criminal terms, such as "piracy", "theft", and "stealing" to apply to things that do not meet the precise legal definition of those words.
For example, consider "steal" and its variants. Here are some common examples of usage that are not literally the crime of stealing. Many are not even crimes or torts.
• Someone says they do not like cats and have no interest in having one as a pet. A cute stray kitten shows up on their doorstep, they take pity and feed it. They fall in love with it and keep it. They might say that the kitten "stole" their heart.
• An actor playing a minor role in a play gives a performance that outshines the performance of the stars. Many would say that the actor "stole" the show.
• An employee of a rival company poses as a janitor to gain access to your lab and takes a photo of a whiteboard containing the formula for a chemical that is a trade secret in your manufacturing process. It would be common to say that the rival company "stole" your secret formula.
• When crackers gain access to a company's list of customer email addresses, passwords, or credit card numbers, it is commonly said that the data was "stolen".
• Alice is Bob's fiancé. Mallory woos Alice without Bob's knowledge. Alice elopes with Mallory. Most would find it acceptable if Bob said that Mallory "stole" his fiancé.
• A team that has been behind since the start of the game but wins on a last second improbable play is often said to have "stolen" the game.
I could go on [1].
[1] I believe I once posted a longer list, but HN crashed shortly afterward and had to be restored from backup. My post was lost.