Because it looks ugly, there is no other reason. Most of these >>605084 are engineering issues which can easily be solved, for example: Instead of mounting them below the tail they get mounted after the tail, solves the issue with airflow; Instead of using liquid, use solid fuels, has the same maintenance, failure rate and storage conditions as the missiles aircraft fire thousands of; Carrier aircraft are already built with reinforced hardpoints and stronger heavier frames so they can take catapults, just use carrier aircraft.
It would even be more economical than catobar.the system of which takes up quarter of an entire deck and is a constant danger due to connection with reactor.
Could stack ten thousand RATO-like pods in that deck space, which is more launches than an aircraft carrier sees in normal use, and it's easy to resupply them.