The Thunder do have PG's, Westbrook and Maynor. Westbrook is not the typical one, because he excels at scoring, but he's still small and mobile enough to get to anywhere on the court, and therefore can find open guys with success. If you're comparing Reke to Westbrook, Reke is just too big to be able to play in traffic and get through the lanes to set others up. Thats why he's usually does one drive and make a move. So while the Thunder's Westbrook definitely isnt the average PG, he can still do a lot of the things a PG does.
That's ridiculous. Too big to get into the lanes to set up others? Then how the hell does he penetrate and get to the rim at an elite status? How does he constantly penetrate into the paint(when aggressive) and set up guys only to see them brick, or dribble into traffic for a tougher shot, or just bobble the ball out of bounds the majority of the time?
Sure Reke doesn't make the best decisions in the paint when attacking sometimes, and Smart is helping him "map" the floor to better understand where the options are, but that's completely different than saying he's just too big to get into the paint to set up others. I mean, do you watch the Kings? Do you watch the worst shooting team in the league constantly brick shots off his penetration? Do you just happen to be in the other room when Reke penetrates and sets up JJ/JT/Hayes only to see them either bobble the ball out of bounds or miss a chippy? Have you noticed how many times Reke could have had 10+ asts if his shooters actually converted open shots off his penetration at an NBA average rate?
Maybe you should also go look at stats, such as ast rate, which I posted a few weeks ago. The guy you say isn't capable of even getting to the places on the floor to find open guys has an ast rate since Smart took over, which is right up there with Westbrook, Parker, Rose, Holiday and Lawson.