Streetwise tends not to be usable because for some reason most published scenarios, IF they include a settlement close to the adventure site at all, populate that settlement with 5 people, none of whom have a clue about anything except for the one that is actually a bad guy in disguise, who is obviously not going to tell the PCs what is going on, and have passing traffic of maybe one person who happens to live right where the dungeon is and can point the PCs right at it, who comes into town to adopt orphans every month (or whatever).
Basically most of the places that adventures happen are ridiculously underpopulated and under-trafficked, and it's a miracle that they don't just disappear off the map, eaten by a single low-level monster before the adventurers manage to travel to them.
If you fix that, then streetwise becomes a lot more useful.