It does make sense. Pick 10 crossbows, send them across the map and activate “Auto Split”. If they meet a mangonel on the way they dodge the incoming shot by splitting. As split is already a formation in the game, the Auto-Split would remove just one click. Auto-Queue also removes atleast one click for you, the production of the respective unit. While Auto-Split would take this Automation feature a bit further (without you would have to check permanently), the point of both is the same: You have the strategic intention of doing something but not necessary the mental capacity to do it.
Just because modern games implement a feature it does not mean that this is a feature meant for every game out there. You can not just take any feature from a game and slap it into another just because it worked there. Features like Auto-Queue have an impact 10 times bigger than all the QoL Features that came with DE combined.
With Auto-Queue macromanagement will become such a joke, as you simply have so little to do anymore, especially in the later stages of the game. Part of the reason AOE2 is really good in casual and pro Level is that you can not do everything perfect, you even have to decide whether doing something is worth your time or not. Implement Auto-Queue and we get a huge step closer to perfect gameplay, which is the worst that could ever happen to any competitive game. And without good and interesting competitive gameplay this game would never be where it is now.