Even if satellites did have exact, continuous data on the location of a target (they don't, and in wartime there would be aggressive countermeasures being used

Even if satellites did have exact, continuous data on the location of a target (they don't, and in wartime there would be aggressive countermeasures being used against them), the targeting data has to be relayed to the launch facility/missile itself and the human components of the chain. Then, once launched, it takes at least minutes for the missile to reach its target. You can imagine the satellites automatically sending data to the missile in flight, but hypersonics aren't particularly maneuverable. If you're ten seconds from reaching the target and it's a mile away from where you thought, it's not trivial to reroute. And your $100M missile just explodes in the open ocean, a very expensive tea kettle. That all said, none of this is impossible, and first tier militaries are putting a whole lot of effort into this problem; in a sense, "it's just engineering." But so far no first tier military has actually seen how their system would work in the field, and the results remain to be seen. Particularly, if China were sure that it could sink American carriers at will, it would already be invading Taiwan.