"Are you somehow claiming we dont trade with other countries outside the EU because we dont abide by all the various and conflicting rules for all the various countries? We do not need to apply the importing countries standards to our own country. If that was true then countries would not be able to trade."
Reading a fair bit on standards over the years, it is my impression that many countries accept EU or US standards because they are quite high, particularly with respect to consumer safety, and because they trust the EU and US to enforce those standards. Since the EU and US are very large markets, people expect manufacturers to do their best to meet them, rather than lose access. At that point, goods can be accepted as 'very probably safe' without investing time and money in checks and testing.