I should have said if you deliberately played 4 sixteenth notes using pure rubato is it at all possible to sound like the 2:3 in strict timing.
I suppose it's possible for the notes to fall in the same place, but four sixteenth notes with rubato applied should sound like four sixteenth notes, not like a polyrhythm.
Im just trying to expand my view of timing
Yes but what is wrong with the 2:3 poly being seen as just 4 notes side by side being played in some other form of time such as rubato? And note the 2:3 the first note of each set starts at the same time so it would come down to 4 notes side by side if looked at linearly (take the 3 notes in bass and sandwich them up into the two notes in treble to create linearity)
2:3 polyrhythm is two separate rhythms going on. It has two lines of music that have different rhythms that align at certain points. If you conceive of it as one line and one (complex) rhythm, you are starting from the wrong place. Don't think of it as being about timing. Think of it about being about rhythm. Timing is a halfway house. Music is about rhythm.