A guided road is against treaty as well, say it's a grey area but it really isn't.
A rod from space impacting with the presumed force equal to a nuclear bomb is in fact a weapon of mass destruction and the language of the treaty is nuclear or other weapons of mass destruction.
It's worded that way specifically so captured space bound objects can't be redirected and used as weapons like Heinlein described in the moon is a harsh mistress.
Pop scientists routinely mis-represent facts to make warfare seem unappealing and lame, this is due their 'sense of morality' (read: crying baby noises).
For example, Carl Sagan warned that operation desert storm would cause a (non)nuclear winter and mass famine in Asia.