Then please tell us why they can't put a HDMI/DP input on the iMac to be usable as an external monitor when the internal computer dies or just to be used as a secondary monitor?
Or why the SSD NAND on Macbooks needs to be soldered when a guy on youtube managed to hack an NVME connector on the motherboard to make the storage replaceable and expandable? What are the reasons other than driving more sales of new devices when old ones break?
Because they're clearly not technical limitations and without any substantiated info from your side, your comment just reads more like astroturfing ("Apple is so conscious, trust me bro I worked there").