The alternative would be always needing a ship with that one piece of equipment with you when a JD is used offensively against you, or you lose half your ships. That is realistically never going to happen, just as people prefer cloaks over cloak disruptors. The former gives you acting potential, the latter only reaction potential and therefore limits you. People will never chose a Hera over a CD or torpedo (if they are implemented again). Having CDs work like that is a good compromise.
