As I keep saying. ASF are so heavily armored they can only be critted and forced to withdraw. If you aren't using nuclear capital missiles as AA you are doing it wrong.
See the problem?
difference between ASF and Warships is the difference between an unarmored man with a rifle, and a main battle tank, Jellico.
it's a
scale thing. ASF don't natively come with weapons that hit on the warship scale reliably, but warships come with weapons that can annihilate fighters before they get into range routinely. Fighters can and do reliably put one another down quickly with their internal weapons, as you pointed out, it takes a month of sundays and a target that isn't fighting back for an ASF to take out a warship using the weapons it can carry.
Minus that topic I won't discuss because I said I'd stop. (If you're at all curious, PM me, but you probably know the one I'm talking about because we've gone on round about it before on these forums.)
Point is, strikes with conventional weapons against something wrapped in Capital scale armor is...well, kinda futile, a good way to waste pilots without doing anything to the target that can't be cleaned up with some paint and a null-gee buffer.
maybe a nice turtle-waxing, Dunno.
OR you need so many you're essentially paying for a warship anyway, only without the strategic mobility or orbital bombardment capacity.
at which point, our carriers become the achilles heel-assuming we're not close enough to a planet to just use the planet.
Nukes ARE the best option the moment Warships become something more than a random museum curiosity, particularly if the side with the fighters doesn't have a warship.
that, in turn, makes it rational.
For fighter versus fighter, you'd need to be targeting a VERY SLOW FIGHTER with a rather poor pilot to land a hit with existing nuclear weapons-it's akin to suggesting taking long-lance torpedoes into a world war two dogfight-in such a situation, air to air, your torpedo bombers just die-even against biplanes.
against a Warship, on the other hand, you're going after something big, that can't move very well and which tends to lose initiative even when it wins vs. fighters. That makes the warship a viable target (despite the heavy gimping on accuracy).
where the fighter isn't.
and it's pretty much the only 'general issue' cap-scale weapon you can load. The fancy missiles that aren't nukes, are faction restricted, but everyone and their nephew's chamberlain has alamos salted somewhere, even if the Lyrans are too stupid to know when to issue them or in what quantity when facing something like an SLDF battlecruiser with escorts.
(I personally chalk it up to the ongoing typical Lyran Incompetence in canon-they don't even have a doctrine to USE antishipping weapons.)