Not as much as something like semiconductors. If everyone in the world literally stopped selling us shoes, we could likely figure out something passable locally in a few months. Spinning up the tooling and know how for advanced manufacturing of critical technology goods is a years long proposition.
It could in the event of a trade war, which seems increasingly likely for many countries.
Lack of local manufacturing isn't really important in a world of global commerce, but when governments start using their manufacturing as a weapon in dimplomatic disputes it becomes important.
You could argue that about literally anything though, from clothes to bananas - but it's simply not practical for every country to manufacture and produce everything it needs.
Also, clothing and shoes (mentioned in the comment I responded to) are easy to produce without massive capital outlay, and the raw materials are readily available from several countries. I think the local manufacturing argument makes more sense with regard to items that are seen as critical, and which would be impractical to obtain from elsewhere - such as motherboards, processors and the like.
there's a trade-off for sure, but at the moment some countries make a very small percentage of their goods locally, which leaves them more vulnerable to tariffs in a trade war.
Whilst raw materials could be easily available, there is a ramp-up time to move any industry locally, both in terms of creating the manufacturing infrastructure, and in terms of acquiring the skills needed locally.
No, but it matters that you can't get any because some adversary decides to cut your supply. Protecting your supply by force is obviously easier if the source is within the borders of your country.
This is the basic reasoning of every "national security" argument about having domestic production.
The parent is merely stating that basic necessities are also important for the well-being of the nation, it's not just about the IC for ballistic missiles or the 3G circuits that allows Trump to always be on twitter.
I get what the sentiment was, but it could be applied to literally anything.
I don't think it matters for many items, such as clothing and shoes, because they are cheap to make and readily available from several countries. So even if China randomly decided that they wouldn't ship any clothes to the US anymore (which would hurt them just as much, so is unlikely), you can just as easily obtain them from Bangladesh or Vietnam, or indeed make them yourself.