What are songs like U2’s Unforgettable Fire and Ultravox’s Vienna actually about?

Songs like U2 Unforgettable fire
Simple minds Waterfront
Ultravox Vienna

And I just look back and wonder what they were about?

Like they were great songs. I loved them. Everyone loved them but even now I don't know what that were about

Okay when I investigate, seems like unforgettable fire was about having an affair? Or keeping a bag relationship alive, one more lie.

But mostly seems like atmospheric, abstract bunch of words
While musically very evocative
Like it was all about the music
And any words so long as they sounded complicated🙂
What are songs like U2’s Unforgettable Fire and Ultravox’s Vienna actually about?
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