If the VISA issuing officer will actually verify anything, it’s a reasonable expectation (dare I say, obvious) that the applicant must be a resident of the country where the embassy is.

You can’t expect a person living in country X to validate the documents from Y country. It’s quite unreasonable to expect that they will even understand the language the document is in.

If the claim is the VISA issuing officer already doesn’t verify anything and therefore familiarity with the language and system of country Y isn’t necessary, that’s a different discussion.

The thing to fix here is requiring that someone already in US has to go to a consulate to renew/change their VISA. For someone who went to college in US for 4 years, and then did OPT for ~2 years, it’s meaningless for them to go to their home country to apply for an H1B, because all the documents they will bring will be from the US and the home country consulate personnel may not even be fit to check the validity of those documents.