I'm sorry but this notion is unrealistic.
In context of a high intensity conflict, the idea of a PLAN carrier being able to reach and operate in the northern pacific to begin with is a huge demand (as it would necessitate the neutralization of basically all air and naval forces in the western pacific to begin with first of all, as well as the massive logistics tail it would necessitate) -- however the US would also easily detect and track such a force operating in the region and be considered a very high value target.
The US would not merely be using one airbase in Alaska to annihilate said PLAN CSG -- not only would they greatly reinforce Alaska with air power and IADS and ISR and missile forces, but they would be using land bases and naval forces from most of the continental US (long range bombers, fighters, tankers, SSNs and CSGs of their own) to carry out a joint strike mission against said PLAN force.
There are multiple ways to strike at a CSG.
Also, just because the US barely has any long range hypersonics right now doesn't mean that will continue to be the case. Within 5-10 years, that could greatly change.
You are correct, in that carriers are still vital in deploying organic fixed wing military aviation in the open ocean.
And I actually agree that carriers can still be relevant in a high intensity conflict between two superpowers -- in certain circumstances.
However, the viability of such a force (and the size of such a force) greatly depends on the specific supporting friendly forces, the maritime geographic environment, the logistics tail (and vulnerability of said logistics tail) to support your CSG, and how the preceding warfighting actions have occurred to enable (or deprive) your CSG from operating in the way you want.
There are certainly some conflict scenarios where the PLA having a sizeable carrier force would be vital in contesting certain specific wartime objectives (especially ones at greater ranges like beyond 2IC or central pacific distances), but the ability to contest those objectives in the first place requires the PLA to be able to decisively and massively win a westpac conflict to begin with to provide that freedom of movement.
If the US concentrates aircraft in Alaska, then it becomes a very inviting target because it is isolated. I would note that Alaska and Hawaii are about the same distance from mainland China. So if the Chinese military is concerned about Hawaii, the same rationale applies to Alaska.
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Yes, the Chinese Navy undertaking operations against Alaska (or Hawaii) would be a huge undertaking. And one of last resort, given the risks.
But remember the old, official PPP numbers indicate the Chinese economy is about one-third larger than the US. If I look at the latest price surveys, along with normalising the measurement methodology for housing and black market activities, it does look like the Chinese economy is now twice the size.
Given the state of world affairs with the US as violent, predatory and unpredictable imperial power, I do expect China to build a much larger Navy than the US