It may be less the responsibility of the "consumer" of the information and more the responsibility of the "producer" of the information.

If the argument is presented as if something is and will always be a certain way (or even if the argument is presented without admitting that something may change) it can probably lead a lot faster to groups of people assuming the argument will be valid forever.

EDIT: Or can be misinterpreted that someone presenting an argument believes the argument will remain valid forever.

btw. never saw the talks the author cites, and have not followed the trade agreements very closely so I'm only speaking generally here.