Politicians and conflict pundits don't generally operate based on common sense - they tend to focus too much on prestige items and face and ignore anything else. What we know from the COVID experience is when deprived of the broad swath of Chinese manufacturing - everything from nuts and bolts all the way up to but but not including the highest tech - everything stops.
"A Chinese drone for hobbyists plays a crucial role in the Russia-Ukraine war", NPR DJI is selling massive numbers of drones to both sides in the Ukraine war. The US buys Chinese drones and sends them to Ukraine. Drones are going to be a hugely important feature in any future wars, yet China's manufacturing capacity for drone must be a few orders of magnitude higher than that of the rest of the world put together. And not only the drones, but also ALL the low to mid grade parts that go in them.
The US has limited number of high end drones, but once those get used up, has a very low manufacturing capacity to replace them. And not just drones, but also run of the mill munitions - several years of worth of US backup munition stockpiles have already been used up in 1.5 years in Ukraine.
Moreover, in order to expand manufacturing, you have to build plant, but its no surprise that many of the vital parts for building plant are now manufactured in China.
So, leaving aside the arguments over EXPORT constraints on goods to China - the elephant in the room is being totally ignored.