The thing is that if you watch things outside the box this is surely the case.
However if you watch inside the box things are not so obvious anymore.
First, from what I have seen Ps are more likely to play as Zerg in the firts place.
Also I have noticed that weaker players are likely to use to use this tactic against people who seem stronger / better players simply because they know that they don't know have a chance on the long run. What is kinda similar to "grab the money and run" logic. Which is more of a (S)P logic than J logic. Plus there is the factor of risk that many Ps often like. I mean this tactic is a easy fix, what is more of a P field of expertise in my opinion.
Also I have seen EPs that don't have the attention span needed to play intense 1 hour games. While on the other hand I prefer long games because they allow me to have much much larger number of options and possible plans. Basicly almost all games that lasted over 45 minutes I have won.