Arguably your 2KHz right and 4Khz left are dead spots/ near dead regions.
If you throw lots of power into these areas to overcome the significant degree of loss, potentially you’re going to just hear distorted noise instead of a clear nice signal. The secondary downside is the potential for upward and downward spread of masking. Now that sounds like some wonderful wordage, but let me loosely explain how.
The basilar membrane in your cochlear is a shapable Demi-organ, somewhat like your tongue, but comparatively 1000 times smaller, with rows of inner and outer hair cells on it. If you were to take your electric toothbrush and press it gently into the surface of the tongue, the immediate area where the bristles are would vibrate, and you would feel it. If you pressed your toothbrush harder you would likely feel it across most of your tongue. This vibration is equivalent to the input of sound waves. The detection of vibrations in other adjacent areas is the ‘spread of masking’.
So in summary, those massive dips in you hearing are best ignored and the average values of the points either side should be used to calculate a gain figure. Or even less if the hearing aid is likely to feedback there as the amplified signal is just ‘wasted’ in that region.