Metal post and concrete question

Id probably put some anchors in the concrete.

I realize this is a pole light, but this is the setup id use.

LINK

This is one of those things where it looks like a good idea and will be kind of a set and forget type of thing but the reality is that concrete will rot steel as surely as it does wood. Might take longer but the end result is the same. I thought about doing much the same in my future deck build but after a lot of research and thinking I'm going with concrete footers and properly galvanized steel post bases to set 4x4 posts with. One thing that concrete does very well is that it wicks moisture and you do not want to set plain steels or wood on it without an air gap.