It's vile hypocrisy. If they want to be priests, strip them of everything and they can live and work out of a concrete box in a mid-western cornfield. Why the material distraction if they are so religiously pure.
I know these people and I can tell you they aren't close to as smart as they think they are. Do you remember Yudowsky's "math petss"?
Reliably differentiating between trusted, tainted, and untrusted data and ensuring that you don't mix the latter two groups in with the former is something we've known to do for nearly a half-century. Hell, even the youngest plausible programmer at the LLM companies is all but certain to be aware of SQL injections. And yet, despite their claims about being so serious about safety, they show zero interest in following long-proven software safety practice and rearchitecting their software to make it impossible to mix system, user, and attacker-controlled data. [0]
[0] One might argue that the fundamental nature of LLM-based systems makes this impossible. If that were true, then it would mean that these systems are impossible to make safe... the only safety option available would be to establish comprehensive blacklists, which is simply infeasible.