Filmedin3B
[03] Disciple
I think it has to do with so many people considering frame data to be arcane and impenetrable. Hell, the fact that health bars have corresponding numerical values straight-up baffles a lot of people...
As far as new players, I was going to say they'd learn eventually, but since the training mode doesn't really cover or even introduce the concept of advantage/disadvantage, the frame data is pretty much useless to them.