If the goal is just "stick 2 pieces of wood together" sure there are a hundred cheaper ways to do it.
The flaw of pocket screws is exactly that "pockets". Pretty much all of those other alternatives are better, in that regard.
Pocket screws do have a place, but they have limitations too. I have had a K-5 for a long time. That's the bench mounted model, with the locking lever in the front. (You have to reach around for the K-4)
It comes in a kit, with the hand-held Vice-grip type block too. Then there is the little "single hole" unit too. It is great for hose ones you didn't know you needed. However, the pockets are a problem.
They have their place, but they can't do it all.
@4nthony that's hilarious, true but still amusing.