*Why do we even need Iterator patterns?*

So I lean back all relaxed and sh*t, refurbishing my design patterns knowledge, everything going fine and dandy, as I wait for the weekend adrenaline to kick in. My life couldn't get any smoother. Next thing you know... I get the biggest realization of my life day.

Why do we need Iterator Pattern? Or better phrased as

Do we even need Iterator Pattern in today's age?

Since I'm a native PHP speaker. No-brainer, I was going through this official DOC.

So through various Rube Goldberg-ish examples the documentation goes on to create various objects, only to eventually iterate over them using foreach() or a while() so my question is where in the grand scheme of things does this pattern fit in, or as always ....

Am I missing something?