makes sense to the average non tech people.
The sad truth however is that it wouldn't even solve the issue, criminals will always be able to use encrypted communications: there are open source software that can't be tampered with, software that doesn't use a single server where backdoor can be put, or they could even simply encrypt their text message.
i could do that from my mac terminal, encryption is basically mathematics. Bruno Retailleau isn't somehow going to put a backdoor in every device that could be used to encrypt. People even used to encrypt communications before computer.
The only looser of that law is the normie, you and me, who use whatsapp or signal to chat and couldn't ever push their relative to use things like pgp encrypted email.