The difference is vast between standing somewhere and looking through a webcam and it will never become otherwise. It doesn't matter how good your camera is. You seriously are pretending that you know what the ocean is like because you looked at it through a camera? It's not even close to the same thing. What does it smell like? What does the breeze feel like?
Unfortunately immediately after having smelled an alien ocean or after feeling the Martian breeze a human will need replacing, whereas a robot will remain functional. A human standing on another planet will be sensing everything through mechanical mediation. Gazing through a visor may be preferable to viewing via a remote screen, but you are unlikely to ever be feeling that breeze on your cheek.