Well it doesn't help does it? This has the feeling of Russian ultranationalist asking why so many european countries want to join NATO after the war. Sure Finland hated Russia before the war, but the very real threat of invasion is what forced them to actually do something it. Hate is just a feeling, but missiles and nuke tests are a good motivation to actually do something about it instead of just ranting online.
Or China could have forced it open a decade ago, flooded the country with chinese goods, chinese media, chinese schools, factories and money.
NK was dependent on China decades before B&R was a thing.
And no wonder why China's closest allies are all corrupt shitholes. How are your parenting skills? Do you allow your 5 year old to drink beer and do heroin before bedtime? But let me guess, if NK wanted to become close allies with America and open up American bases there, suddenly China has the will and the strength to find a big enough stick and carrot to make NK do a U-turn on it's forgein policy.