The idea of Yichus is to appreciate the fact that if you are descended from _____, it means that you have a certain potential as a result. Being the descendant of the Avos means that we have inherited the greatest potential possible and it is much more deeply ingrained than the potential one has as a result of being descended from more contemporary Gedolim.
I am not a yachsan; I do not descend from any famously prestigious lineage; I always found it quite childish to boast of Yichus. Nevertheless, it isn’t just boasting, there is some sort of maaleh, although I don’t know what it is (I don’t think zchus avos is the correct answer). Are you saying that as long as you descend from the Avos, having other gedolim along the route is irrelevant? Or are you just decrying the condescending attitude of Yichus?