Quote - Try to feed your monitor with an HDR-Image linear downgraded to 8 bit RGB. Dosn't look good, right? Now correct and use a Gamma of 2.2.

You must first understand what is a HDR image. To view a HDR image you need a HDR monitor, it is impossible to do it with a normal monitor.
There are very few and expensive HDR cameras and monitors, if you haven't one the only thing you can do is to use a subset of the HDR image, do tricks or make fake HDR.
HDR images can be used by the internal rendering process and can improve the scene, but only when the rendered scene has a final illumination with a normal dynamic range.

Stupidity also evolves!