Of course, this is not only about Ubuntu, Fedora, or Linux Mint, as it would apply to all GNU/Linux distributions, desktop environments, and application hubs lke Flathub or Snap Store, which will have to comply with the upcoming law in the near future in some way, especially since similar laws have already been proposed in other US states, including New York and Colorado.
The uproar is the same uproar that has always existed when government overreach threatens privacy. The question should never be, “why are you fighting this?” the question is, “why is this needed?” And the answer is that it is not. It’s yet another mnaufactured moral panic which is being pushed by the folks who want to destroy privacy. Some want that destruction for the privacy so that they can spy on and control others, the rest are dimwitted fools who believe that they can give up privacy to obtain some small measure of security. They are wrong and in the end will have neither privacy nor security.