The curse of dimensionality is the result of correlatives of the fact that:

at higher dimensions, most random data points become equidistant from each other — you can prove this to yourself pythagoras and some math of expectation

1. random vectors are almost orthogonal
2. unit sphere takes almost no volume in unit square (?)

User Stories but harder and more rigerous: https://www.visual-paradigm.com/guide/customer-experience/what-is-customer-journey-mapping/