Earlier quoted context omitted.
How complex is a song that can be played on entirely different instruments without re-interpretation? When I think of complexity I think of unreconcilable elements that force the transposer to make tough decisions ("intentionally putting their own stylistic spin on it").
I don’t really understand that idea of complexity, but Rick Beato is addressing this song from a music theory perspective, and I think this song would meet anyone’s definition of complex when it comes to theory.
- Rhythmic patterns and variation
- Interplay between instruments
- Instrumentation and arrangement
- Structure
- Vocal style
- Lyrics
- Recording and mixing
By these metrics (and the ears of 99% of its listeners) it's a more or less generic 80s adult contemporary song. Yes it has a weird chord progression. Would it be more complex if it couldn't be boiled down to a series of chords?