The obvious reason why, is cost!
I need my front derailuer's cable to be replaced and I'd like to simply buy some raw brake cable from the bike shop and simply re-insert into my existing campy cable guides. Can that be done, or do I have to buy Campagnolo cables? Is there a cable guide or some PDF that has more technical details specific to Campagnolo cables?
I have Athena 11sp with 11sp Campagnolo Record shifters - not EPS.