Everybody has had a complete 180 in terms of copyright protections. Before, nobody cared about downloading music, movies, TV shows, or pirating games. Now, when the copyright law is affecting them, they are gungho about protecting these billion-dollar companies' copyrights.
Its not about "billion-dollar companies' copyrights", but also about voluntary copyleft free software. If I license my code under GPL I don't want other persons/companies just whitewash that code through LLMs and use it in their proprietary code.
A more logical explanation would be that there are different opinions and those who complain are usually louder.