Apparently those measures have not had an negative effect on productivity in the Netherlands, so I do not see where you are coming from.

And you are also forgetting that this is done to prevent the spread of life-threatening diseases for which we do not have a working treatment yet and the emergence of new diseases of that kind.

Those are hard problems. Hunger in the first world is not (we already overproduce any kind of food) and even if meat would become scarce we could just use a fraction of the resources which are now used to raise livestock to feed ourselves.