You made a lot of great points.
However, there is one key factor to consider: Submarines.
Submarines, thanks to their stealthiness, can make direct observation and interdiction very challenging simply by using the water blanket as cover.
Which is why submarines are so effective at hunting convoys during both Atlantic Wars. This is also why the Soviet Navy envisioned that their nuclear attack submarines be sent to the North Atlantic to intercept any NATO reinforcement convoys coming from the US to Europe in case a land war between NATO and Warsaw Pact broke out on Europe.
It is a well known fact that the US and her allies have the best submarines suited for long-range operations, which is absolutely perfect for stopping oil and gas shipping between the Middle East and China.
By distributing those attack submarines in the Indian Ocean and Western Pacific Ocean, I believe they have sufficient capabilities of not just facing off with the PLAN, but also interdicting shippings heading towards China.
Of course such actions would have global-scale consequences, but it's not like you can expect the US and her allies to be reasonable at this point, when their combined nuclear arsenal are the largest or 2nd largest. Just look at how arrogant and ignorant they are since the start of the Russia-Ukraine war.
(This is in light of reports where nuclear-armed countries in the West, especially in the US, vowed to even nuke countries like India, Brazil and Indonesia if they are getting nuked, just because of the "If I'm going down, I would rather take everyone down with me than leave anyone standing. And I mean EVERYONE." mentality.)
Hence, I believe that submarines are the utmost threat towards the shipping lanes between China and the Middle East. This needs to be look after and effectively countered in case of war.