Just reading it wrong. You can't turn off ads in scenic mode, but you can turn off scenic mode.
Vizio kind of has a lot of dark pattern messaging. As an example, they make it seem like you HAVE to enable the microphone on the remote or install an app to change the TV volume. They don't provide a diagram of the remote, so if you don't notice the volume rocker on the side, it seems like you only have two rather invasive options.
Another example is they use wording that makes it seem like you can't use the TV if you don't agree to the terms, but if you do select the disagree button (and after confirming you really want to disagree lol), it just reverts to a dumb TV.