How so? Github could simply say "we're required by law XYZ to hide your account. If you feel this is an error, please click here and reach out to our specialist

How so? Github could simply say "we're required by law XYZ to hide your account. If you feel this is an error, please click here and reach out to our specialists who will review your case". Instead, they chose the Google route and simply offer zero support and no way to challenge the (likely automatic) decision. I doubt that secrecy is part of the law, if their reason even is a law.