The problem us not only ice cream it is the Chief Rabbanut’s desire to be the posek for the Jewish world i.e. the giyur question, weddings officiated by American Orthodox Rabbis,persobnel status of olim etc. importing to Israel OU CHICKENS ETC it is also a question of “economics” there is a lot of money in the hechsher business.
assume all it had to do is print on the label calav nochri
and let buyer beware