If you like, you can keep a record of the number of moves you get the same as in the text and watch it rise. It won’t rise evenly, as some games contain many obvious moves-others not. But if you take an average over ten games, your average for the next ten games will be higher. And so on.
It is axiomatic that positional play is concerned only with small advantages and disadvantages. Big ones naturally occur only through forcing moves, i.e. combinations. But because the great majority of chess moves have to be positional, positional play is, taken all around, of roughly the same importance as combination play.