Completely eliminates the need for a cookie permission bar.
If you want to remember dark mode with a cookie, then you can just gate that setting behind a “allow functional cookies” toggle.
Getting consent for functional cookies doesn’t have to be done with an intrusive cookie bar on landing. You can request consent as it becomes needed. There’s other ways of complying that aren’t dark patterns.
You are correct that people keep stating such things. But it is incorrect.
That example would be an essential cookie, also known as a strictly necessary cookie.
A shame this FUD is still being spread.
At least for GDPR...
The only ways to actually track without a consent pop-up are:
(1) stay off the device entirely and process server-transmitted data under legitimate interests with a privacy notice, or
(2) confine any device storage to what's strictly necessary for the service the user requested