CineCamera Exposure vs. PostProcess Volume Exposure

It states in the Docs: Manual mode enables the use of Camera settings within the Post Process and Cameras settings to control exposure, rather than using only the settings found in the Exposure category.I’m assuming if your CineCamera is in Manual Mode there would be no need for PostProcessVolume Exposures then??

*if your CineCamera exposure was enabled, there would be no need to enable PostProcessVolume as well is basically what I’m stating, is this true? **My renders were extremely blown-out (threshold wise) BECAUSE I noticed the exposure levels were turned on in the CineCamera and PostProcessVolume.