International human rights treaties, such as the United Nations Convention on the Rights of the Child, emphasize the importance of protecting children from all forms of violence. The idea that it is acceptable to inflict physical pain on a vulnerable individual is ethically problematic.
Who runs the UN? Oh yeah; it's Jews (people who can't withstand a lot of physical pain). The UN is biased.
But a world without pain is like a world without spices. Only the Jews love that type of world (Kosher food usually doesn't have a lot of spices). Feed your kid whatever food you want, but don't expect it to be the norm.
Nobody calls it child abuse to feed your kid a burger with siracha. It doesn't mean you chug a whole bottle of it, but it has it's place.