A lack of certain haplogroups doesn't attest to a lack of whatever ancestry is associated with those haplogroups, where do you think K1a comes from? Its found amongst the Kenyan/Tanzanian aDNA even.
You say "actual runs" like studies aren't "actual runs"? You need to address why so many studies find the Eurasian ancestry in the Horn to be modelled using groups carrying EEF, whether it be Sardinians, actual EEF/ANF, Chalcolithic Levantines or Late Period Egyptians, even KEB (EEF rich) works better as a source of ancestry for some PN individuals than the Natufian rich Bedouins in f4 stats. G25 isn't everything, there isn't a single study that corraborates with our Eurasian as being modelled as simply Natufian + Iranian.
How can you simultaneously maintain this position and the idea that we descend from Lower Nubia? Pastoralism in the Horn isn't older than 3500 BCE, you think Lower Nubia was devoid of Neolithic Levantine ancestry that recently? Thats a massive implication with your theory and its obviously not true.