Sorry, but our security situation today is FAR BETTER than Ming.
In the Ming Dynasty, we say "天子守国门", or the Emperor is defending the nation at the front line. Because just less than 100 kilometers north to Beijing, there was Mongolia military that threatening us, and later it was Jurchen (女真).
Why you think Ming chooses Beijing as the capital? The reason is simple. The mountains north to Beijing is the LAST geographical obstacle in front of the enemies from the North. If Beijing lost, there would be NO other similar geographical obstacle till the Yangtz River. And that's also exactly the reason why the most magnificent part of the Greatwall was built so close to Beijing.
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Honestly, the death of USSR in 1991 marks the first time in the China history that China completely gets rid of the military threaten from the North. In the long China history, the military force from the North is always the NO.1 national security threaten to China. But it is gone, all in a sudden, in 1991. Thanks to Gorbachev! Chinese people love you!!
Compared to the security concern that Ming is facing with, the Taiwan issue, or the South China Sea disputes, or the US high tech ban, is merely NOTHING.