It SORT OF works in stable and predictable situations.
What seems to be happening is that your brain, in all of its neuroplastic glory, is learning to make better inferences from the broken information it receives.
The issue is that this works as long as the inferences are correct. That's fine when you are reading a newspaper, using the computer, etc. as the situation is stable and predictable.
The problem is that when you are suddenly confronted by a situation where the inferences are NOT correct--such as a nighttime emergency situation while driving. Now you are relying on the "uninferenced" data coming in from your eyes and that data is subpar with all the resultant problems.
The best solution is both: fix the data coming in with corrective lenses for unpredictable situations, and train your brain to make better inferences so you can deal with predictable situations better.