While I'm sure there are some benefits to driving around WDW, paying for parking isn't one of them. Heck, I only drive two hours a day back and forth to work, and most of the time, I wish that most of the drivers I encounter would quickly find the nearest cliff... Believe it or not, I tend not to be a very patient driver.
My idea of vacation first and foremost is relaxation; not driving while on vacation is a definite plus for me. And not paying for parking leaves my money where it eventually ends up being...
Out of my wallet and back into the Disney coffers

!!!