At work I have the ability to remote into other people's devices. I ask them to go to a link, pick my name out of the list of people who are online to help, click on it, and then they are asked to allow me to access their device. Without permission, I can't access the device. With permission, I see their device on my computer screen and I can take control of their device remotely. I can either guide them to click here ... click there, or I just do it for them.
This cannot happen without you requesting assistance and granting permission for someone to access your device. Access is terminated at the end of the session by the person who has taken control of the device. Each session requires permission to be granted, and even though it happens once, it cannot automatically happen again.