OR (story time) if you are like me, and you end up needing cash in rural Oklahoma to pay an upcoming cash-only toll, and you pull off at the ONLY gas station between you and the toll, you could get hit with a $20 fee to pull out $20 (because its a freaking casino).
That said, there are many online-only banks that are part of ATM groups that have 100k free atms at various places all over. I use them.
And when traveling abroad, oddly enough the best cash card I've ever had is a CapitalOne debit card. I only use it when traveling, but no FX fees, and no ATM fees. So in the UK, most of the major banks and grocery chains have free ATMs, so I get free access to my money even abroad.