That's not the audio guide. You've selected the secondary audio track from the video that's playing. It's designed for sight impaired users. I don't use Netflix any longer, so I can't say how you change the track being used. But it should be an option while it's playing.
Dan Roku Stick (3600), Ultra (4640), Ultra (4670), Premiere (3920), Insignia 720p Roku TV, Sharp 4K Roku TV, Nvidia Shield, Windows 10 Pro x64 running Serviio and Plex on a wired Gigabit network.