I hope you won't get a reality check if one day there is a famine in Europe caused by outsourcing the entire farming to other continents. The very first thing any enemy force would do is a naval blockade, the rest is patience and lots of deaths.
So even if these lobby talking points would be true, and everything had to be 100% subsidized, that wouldn't be a problem.
If having 1% of beef imported causes a famine, then the farming in Europe is actually pretty awful.