For existing privacy options — location, microphone, camera — Safari on iOS has the options of "ask"/"deny"/"allow".
I wouldn't be surprised by legislation for a Do Not Track option in DMA designed Gatekeepers' browsers, defaulting to "ask", where all three options must be handled accordingly by websites.
"Ask" would also have to be the default behaviour when no preference is transmitted.
In much the same way no banner is required if no cookie is being set.
Granted, you can't legally use it like that where EU laws apply, per the GDPR. Hence the complaints about the GDPR you see in other comments.
DNT: 0 = Yes, track me.
DNT: 1 = No, do not track me.
> I'm not even sure with it set to 0 that you can assume that intent.
That's the problem. Someone not paying attention might inadvertently set DNT: 0, which is why the law is written the way it is. But at the same time we have techies who knowingly and carefully set such values and want the service to acknowledge it, contrary to the law. Hence the contention.