You can have a cryptographically secure platform for whatever governance platform you like, but if it's running on a traditional centralised server infrastructure within a political jurisdiction, it's completely vulnerable to tampering of government agencies within that political jurisdiction. This is a well acknowledged issue referred to as "data sovereignty" with the limitation that the way to ensure it's handled is to pick a reliable jurisdiction.
If we acknowledge that no jurisdiction is reliable, however, blockchains are the only choice.