A deleted question, that I had typed out a response for but couldn't submit because it was deleted (in case it helps anyone):
>> Why not just make a browser plugin that scrapes the screen when the user is presented a txt record to add? Reducing the security of DNS registrars is probably not the solution.
> Lots of reasons, the main one being that this would require every domain registrant to download a plugin which would then somehow need to integrate with a DNS provider.
There are other solutions [1] for simplifying the creation of verification (and other DNS records).