"Speed" could be seen in terms of perceived time for distance covered. No reason with a robot-uploaded consciousness that you couldn't slow its perception of time such that travel between the stars becomes something comprehensible by a human-like mind. A bit like video game time acceleration, but real.
That doesn't address what happens to the visitees, but if that kind of slow-scale exploration becomes the default, then any civilizations on a similar level to the robot explorers would have technology and societal structures in place to support meaningful contact of that nature.
