In functioning states, the ID contains a chip with a private key that can be used to sign a message, and ID verification would not be an image of the ID card, but rather holding your phone's NFC reader to the card and signing a message from the site.

In Japan, there are already multiple apps which use something like this to verify user's age via the "my number card" + the smartphone's NFC reader.

It's more or less impossible to forge without stealing the government's private keys, or infiltrating the government and issuing a fraudulent card.

Of course, the US isn't a functioning state, the people don't trust it with their identity and security and would rather simply give all their information to private companies instead.