I think that argument, unlike mine, was very serious.
Space and time are not two different things.
If you time travel and stay in the same relative location, say, just outside the local pub, you can be required to space travel at or above light speed, depending on how much time we're talking about.
If you look at time travel as not including space travel, you'll end up somewhere else.
Hopefully closer to my pub, so you can buy me a beer.