Then it sounds to me like Fiverr may not be a good fit for you as a freelancer. If you are this concerned about Fiverr’s vetting process, and their security request for you to confirm who you are, then maybe Fiverr isn’t the right place for you to work.
This is how Fiverr has chosen to run their business. We, as sellers, cannot change this. If you don’t like their security measures, then you don’t have to work here. That is a choice you are welcome to make.