Djibouti is also the same appendage, so is Kenya, so is Egypt, whose colonizers did purposely excluded Ethiopia in the deal to share the water of Nile, while the latter is the source of the same.
So is Somalia.
Worse yet the appendages are not yet ready to clear themselves from the burden of the same legacy.
Ethiopia, a country that has never been colonized in the whole of its history, will going to have a lot more to do in cleaning the remanentes of colonialism in the region. Else our freedom is not complete yet.