Yeah, because we'd hate to allow people from poor countries to contribute to FOSS projects, right?

Or teenagers without full access to online banking.

Or the unemployed.

Oh, give me a break. No one is taking the ability from others to fork the repo. If these exceptional cases really were to happen, how fast would it be for someone else to notice and do one of (a) notify the maintainers to get this particular user whitelisted or (b) front the entry costs?