Porque no los dos?

You can jam the remote control for "surrogates".

You could do local AI to workaround that, but then ya'know... skynet...

Also distance may be a problem, especially if we're talking space warfare.

And surrogates would probably look more like the robot dogs or air/ship drones we currently have though, with some human-like ones sprinkled in.

Put a remote control operator in a spartan suit to pilot drones nearby!