To paraphrase Stinger in Top Gun, "You don't own that training; the taxpayers do!"
All arguments comparing what these pilots are doing to trade agreements are irrelevant. Government decisions, whether right or wrong, are national level decisions. This is about individuals deeming themselves authorised to make decisions on the spot about what can or can't be passed to a potential adversary.
A very simple benchmark would be to ask whether what is being demonstrated, if described in writing, would carry a security classification higher that 'Unrestricted'.