Not much point having all those pixels if you cannot trim a few. I have often wondered where all those trimmed pixels go. I suspect there is like a big pixel landfill where they eventually rot down into a electronic mulch. You could always recycle them into a collages and sell them to ageing eco warriors as desktop backgrounds.Plus, I can't stand trimming pixels off my 10.1 megapixel images.
Seriously though I suspect nobody on this forum will count your pixels to make sure you are not short changing us. There are forums where there are people with Phd qualifications in pixel counting but it has little to do with photography. As Colin has said above change your viewfinder screen if it worries you. I used to have a bridge camera with a thirds screen and it was quite useful when mounted on a tripod otherwise I found I had enough to think about.
Steve