Please, elaborate. I can share my screen with coworkers and talk about all sorts of confidential things, and I can even give them full remote access to control everything if I wished. So why would pushing a some plain text code directly to their machine be so fundamentally different than all the other means of passing bits between our machines?
If you share screen you are in control of what you show, if you give someone SSH access, what would stop them from passing/running a small script to fetch everything you have or doing w/e with your computer? I mean it's a blatant security violation to me. Just no reason to do that.
In large corps you usually have policies to not leave your laptop unattended logged in, in the office, that would be potentially even worse than that.
