Think about it!
For example, if a wiper blade is 4" shorter than OE(and I'm going extreme here), it's 2" shorter at the top AND 2" shorter at the bottom. Not where I am looking out of the windshield! And if it's an INCH difference, it's only .5 on either end! You'll never notice it.
Do you look up into the tinted area of the glass when you drive? I don't! I may scan the area but, I don't drive this way. Nor do I look down at the dashboard of the car when I drive. All you'll see is dust that you didn't clean.
Try it, you'll never notice the difference. Nor will anyone that might drive your vehicle.
And I only bring this up because, I have needed a wiper blade in a hurry and all I was able to get quickly was a shorter version. Mainly for the drive side as the passenger side is already SHORT!