Well true. The loss stealth when launching would be a crucial
loss.
However, when we think about this kinda mothership technology, we
would really require a lot of automation and unmanned weapons
technology.
In this example, as aircraft today are generally too big to fit in
a sub, we would have to go along the line of UCAVs. And for surface
and sub surface threats, we would have to think along the lines of
USVs.
One benefit of having a submerged platform that can launch strikes,
would be avoiding satellite reconnasiance. However, honestly
speaking... the need for a submarine to carry UCAVs would be
very... redundant. Since UCAVs are generally cheaper than planes,
and can cheaply be deployed to forward bases without fear of
loss.
I still say its better to launch VF-1 out of submarines. Got
gundams better still.
In anycase, the aircraft carrier... in the end, is a symbol of
naval supremacy and might. Something u actually WANT people to see,
and not hide.