You won't receive security patches, leaving your computer vulnerable to exploits.
"Pro" software cracks are the most common delivery method for ransomware and keyloggers that can steal your banking information.
If you are on an Apple device, the native Photos app now has a "Duplicates" folder in the sidebar that automatically identifies and merges identical shots safely. Why Avoid Software Torrents?
If you are looking to clean up your library without the risks of malware or legal issues, these tools are highly recommended:
While known for system cleaning, its built-in "Duplicate Finder" is excellent for finding exact copies of photos across different folders.