Why? It's meant for pair programming and has already been done as "Live Share" in Visual Studio / Visual Studio Code. It's a way to work together in only what you give the guest access to.
Thanks, I understand what it's for, and I personally didn't want a potential security hole added to my work environment. It's just an FYI for others who are concerned about security. Here are the security details: https://www.jetbrains.com/help/idea/faq-about-code-with-me-s...