That's a pretty cold take. If the extension did not need info from linkdin that is not publically available it would not be an extension.

And second, I am not ok with my info outside of my control even if it's public. I might change my mind about it being public, or I might want to change part or all of it. Good luck doing that after it's been fed to an LLM, even IF the company adheres to the GDPR and has not been resold several times along with your data.