They make that up with reach. They are good with almost any bow and are easy switch poost starters.
Max amount of overall stats is 5 for light poke. Either adding an extra stat would make it unbalanced, or exchanging some reach for strength would make the weapon have a weaker poost. That would make it be quickly disregarded and left as a mediocre weapon by many. The 5 reach stats are what make it so unique and good.