Without China's support, North Korea is nothing, and right now they are nothing and will continue to be nothing as long as China stays out.
Which is far from certain and much more complicated.
China is the reason everyone dances around North Korea.
Let us not forget the whole relatively forgetten war in between the much bigger WW2 and Vietnam called the Korean War which created North and South Korea.
The Chinese essentially said cross this point with your invasion force and we get involved. The US crossed that point and China flooded Korea with troops and essentially pushed the US forces across the Korean peninsula into the sea.
Rather than then escalate it to what would have been a serious and likely Nuclear War even back then with a much less advanced China they simply went to the negotiation table and divided the country in two.
Then there is Taiwan. Taiwan being the Republic of China, the non-communist former Chinese government pushed all the way to the island in the Chinese civil war.
Taiwan went from being internationally recognized not that long ago to having its recognition dropped by most of the world. Why? China is now much more powerful and most of the world is not willing to stand up against China over Taiwan and would rather just see China do what it wants. As going to war with China would be a total war and a nuclear war, and they would rather write Taiwan off.
The USA is one of the last to support it and not abandon it to the all powerful China.
China wants it.
Nobody talks about it, they don't want tensions between China and the USA.
Then you have Japan, which now has to deal with China doing more and more of what it wants as an emerging super power nobody wants to actually stand up to too strongly. With a lot of US military bases in Japan, and strong ties, that is also a key issue.
There is a lot at stake, and nobody is sure China won't get involved. They already don't like the US in that part of the world and want to be the dominant super power and influence over there.
So people tiptoe around North Korea.
There is some strong potential for some serious demands or changes in a lot of things over there if some tensions between the US and China arise, and at a minimum they could lead to changes in regional policies well beyond North Korea.
And if those things go poorly could become something like a new Cold War or even worse between the two strongest powers on the planet.
It is not something they just play around with lightly, or even openly mention in the media. Nobody wants any of that, and they don't want the average ignorant American weighing in with the typical nuke em all take everyone on point of view leading to some patriotic anti China sentiment that makes things worse. So they only mention North Korea.