We suggest the Jewish people take the laws of chometz seriously.
Perhaps the laws of chometz apply only in the first place to residential habitation. That would correspond to the condition of the Children of Israel in Egypt, who, in the event, did not own their own wealth – their gold and silver and clothing. The brick-making factories were not in their possession, nor, likely, were the breweries.
If the laws of chometz applies only to residential property, then breweries would not be a problem and the heter makhira would not be necessary.