I sense different basic assumptions

From what i understand, pichlo judges the image when its shown scaled to fullscreen. Possible pixel density of the image exceeds the one of the screen in that case.
Another approach is to view the image at "100%", which gives a rather gigantic impression given a 13Mp image viewed on 200-330ppi screens larger than 7".
I tried to make a screenshot from 100% scale displayed on Jolla Tablet, just to realize there is no possibillity to view the scaling factor in sfos gallery or lock it to 100%...