Yeah and has this actually been audited? Tech companies routinely lie about data collection. What's more likely, JetBrains decided that 1 year old LLMs are so foundational a technology that they needed to embed this crap irrevocably in the IDE? Or that they purposefully embedded it so that slurping up your code is hard to disentangle from diagnostics data collection?
According to one of the other comments here, the plugin is enabled by default, you just can't get anything out of it until you get a subscription.