ID verification doesn't protect against that. Why not? Because there are a lot of people that will trade their ID for a small amount of money, or log someone/something in. IDs are for sale, like everyone who was ever a high school student knows for "some" reason.

Plus what you're asking would require international id verification for everyone, which would first mostly make those IDs a lot cheaper. But there's a second negative effect. The organizations issuing those IDs, governments, are the ones making the bot armies. Just try to discuss anything about Russia, or how bad some specific decision of the Chinese CCP is. Or, if you're so inclined: think about how having this in the US would mean Trump would be authorizing bot armies.

This exists within China, by the way, and I guarantee you: it did not result in honest online discussion about goods, services or politics. Anonymity is required.