Yes, i understand that, however one can constrain the width text of the text so that one doesn't have to , for example, move the head to read from side to side.

Yes, i understand that, however one can constrain the width text of the text so that one doesn't have to , for example, move the head to read from side to side. However, columns are 2 dimensional, meaning that skimming back and forth between them requires more complex spatial processing than scrolling up-down.