That just shifts it to "what's the point for Cadmus" when they already control the world. Like, understand, there were 145 space launches in all of the world in 2021.
Cadmus has more resources than actual earth.
I think you're not taking account of Cadmus having unknown amounts of advanced alien construction technology. It doesn't necessarily follow from them having more construction output in a specific area than the world that they have more total resources than the world.
Like, suppose Cadmus has an alien fabricator (or similar machine) sitting around somewhere that can cheaply and efficiently construct missiles from raw materials. However, they only have one of it and don't know how to build another one. In that case, they can make as many missiles as they like for a trivial cost, but they can't really be said to have more total resources than the world does; they can just apply them much more efficiently. (Actually, Cadmus having an alien fabricator tucked away somewhere would explain a
lot. This is now my headcanon for how they have so much stuff.)
That said, I agree that the castle doesn't make sense. I can buy that Cadmus could build it, because alien technology could be involved; I have more difficulty buying that they could keep it secret. As you said, it should be visible on satellite photos, if nothing else. I suppose it could have been under a cloaking field or something?
And for gods sake they already have spacecraft anyway! If all he needed was one success he could have done it in an afternoon! Just one and done and go home for tea the next day!
I only needed one! Then why spend however many years and the entire global economy on fucking missile silos? Why infiltrate the weather scientists to steal forty balloons- that's as many as four tens and that's terrible- when he could literally have BOUGHT ONE FROM A CATALOG and released his payload that way?
He can FLY HIS OWN ASS INTO THE SKY CARRYING IT IN A LUNCHBOX if he wants!
That said, can't he just fly? Why didn't he release the metagene virus a week prior to this over Shanghai air space?
We know from this:
There may also be additional, unknown side-effects as well—divergences and mutations in the virus itself as it self-propagates, but speaking directly we cannot account for that at the moment, so we will have to leave it."
that the metagene virus is capable of self-propagation, or at least that Riot believed it to be capable of that. A single release in one part of the world would infect that part, and would then spread to the rest, but that spread would take
time; time in which countermeasures could be enacted and in which the virus could mutate and start doing something else. If you distribute the virus so widely that everyone is immediately infected by the initial release, it has far less time to mutate. (This assumes, of course, that the virus can't reinfect people it's already infected, which is ... honestly a pretty dubious assumption, but whatever.)
However, that still doesn't explain why Cadmus didn't just buy a bunch of weather balloons and launch the virus that way. It seems like it would have been much cheaper and also considerably less likely to be detected.