There's a difference between not using AI tools at all and not using code generated by AIs.
The latter involves a lot of risks that aren't well understood yet -- some technical, some legal, some ethical -- and it's entirely possibly that some of those risks are going to blow up in the face of the gung-ho adopters with existential consequences for their businesses.
I mostly work with clients in industries where quality matters. Think engineering applications where equipment going wrong destroys things or kills people and where security vulnerabilities are a proxy for equipment going wrong.
I know plenty of smart, capable people working in this part of the industry who are totally fine with blanket banning the use of AI-generated code on these jobs. A lot of that code simply isn't up to the required standards anyway, but even if it does produce something you could actually use, there are still all the same costs for review and certification that any other code incurs. That includes the need for at least one human reviewer to work out why the AI wrote what it did, which may or may not have any better answer than "statistically, it seemed like a good idea at the time".