How do you know if security works? If it stops passport fraud completely on international flights then it will appear to be unnecessary. Same with vaccines. They seem to eradicate a disease and everyone gets complacent. Then your kid gets polio from a passport fraud illegal and dies...
In your scenario we’d know because people would be arrested. Of course they won’t be. Because the reality is anything that can be recorded can be forged. It’s not going to stop passport fraud, it’s just going to mean people modifying passports need to have another tool in their arsenal, a fairly cheap, find it on Amazon tool.