

Just because I like getting pedantic: washing food in a dilute chlorine solution is harmless and is done basically everywhere.
Some countries ban the import of animal products treated in that way because they’re concerned it could lead to less sanitary practices before the wash.
The US has almost entirely stopped using chlorine and instead uses something closer to a dilute vinegar and hydrogen peroxide. The EU bans washing animal products with anything except for water.
They allow washing plant products with chlorine.
The EU and US have comparable levels of outbreaks of the diseases that are being attempted to control, so it’s unclear if one strategy is better.
Demanding that another country/region change their food safety regulations is ridiculous, but it’s good to remember that it’s not an argument over a specific chemical or food safety, but over a difference in regulation that could hypothetically be masking a production issue.
While you’re right that there’s no nutritional value to food coloring, not everything needs to be nutritionally optimal. “Looks appealing” is desirable in its own right.
We should justify food ingredients based on functional necessity and harmlessness, not on a strict criteria of nutritional necessity.