Nobody would buy their old USB2 cables when they can get other faster cables, so the manufacturers of the old cables would actually rather pump money into politically pressuring the relevant standards committee into 'massaging' their latest technical definitions to include products which already exist.
People buy USB2 cables all the time, and they're usually correctly labeled too.
But there's no profit to be made when everything new uses USB-C now.
Usb-c runs usb 2.0 just fine! And yet we still have companies trying to make bad USBv(n+2)