the trouble is he cannot do that because he knows that no food has that
kind of data so he ends up hoist by his own petard

I think thousands of years of use by human beings is proof enough.

GMOs have only been allowed in food since 1995, so their long term
safety has not been proven.

By the way, the permission to allow GMOs into the food chain was from
the FDA, as can be seen he

http://www.gmfoodnews.com/index1998.html

Note that no independent safety testing was required. Instead, the FDA
only asked for data from the manufacturer. The FDA is populated by
former members of Monsanto and vice versa so it's highly unlikely that
the FDA would turn down approval for these GMOs...

regards
Marcus