The story wasn't long enough to be dragged out over a whole movie. Also, I didn't think the story was good enough that I would invest 2 hours to see it.
There's only the thought of them as memories and little to no description.
Half of the movie could take place in his "memories", and the other half in reality.
There's a thousand other movies that use that formula.
And you're fucking high if you don't think Dick's story is good enough to be copied directly.
Verhoeven's version makes a mockery of it for even having the designation of being adapted from the original short.