I'm all for a secure E2E for all private communications, but not through prohibitions encoded into laws. Unless it's wartime or similar kind of emergency, it's best to never let the government of any kind to be in control of what[1] you can create (and share with others) and what you can't. No matter how benevolent current one looks like, such capability will be abused by the next one. Better have a constitution-level protection that no government can dictate what technology you must or must not use.

Not to say that it's not uncommon for legislatures to be quite awkward when trying to describe technology. And stay up-to-date with possible future breakthroughs.

In my opinion, if someone has an idea (and implementation) of something amazing that won't be E2E, it doesn't make any sense to ban that. Label as "doesn't provide end-to-end security"? Okay, I'm not fan of this stuff, but knowledge gap is significant, so that may be well-justified. Prohibit advertising as "100% secure"? Sure, as long as that's not one-time pads stuff, that's most likely misleading advertising claims worth investigation. But banning the software or the service? That's nuts. And it impedes on freedom to create things.

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[1] Okay, as long as that's not a nuke. Obvious exceptions apply. (Cryptography is not munitions or a hazardous material, right?)