A: Two thoughts. First, you can leave a foreign country behind in an orderly way. Ask the British Empire, which mostly ended its colonial occupations in an orderly way.
The interviewee says this as though it's common sense, but is it true? The examples that stick out to me are India, Israel/Palestine, and the South African colonies. Can these really be described as safe and orderly withdrawals? What are the examples of successful withdrawals? Are they really that much better than US withdrawal from Vietnam or Afghanistan?