It is about enjoying the complexity of flavours and aromas and a well balanced acidity and bitterness. It gives you an opportunity to appreciate the skills of the masters who roasted the beans.
The youtuber Steve1989MREInfo even does reviews on the taste of instant coffee from MREs.

And to answer a question from Jeanette_Isabelle: I have not experienced shortages of any kind lately. In fact I did not even experience shortages when hoarding of rice, pasta and TP was on itīs height. On the topic of coffee my consumption increased significantly due to working in home office. My local shops can keep up with the demand.
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If it isnīt broken, it doesnīt have enough features yet.