The way the comment is phrased, it implies that it's bad for men in general. Your link says for people with a specific issue.
The link actually says iron overload can also be called haemochromatosis too so a bit confusing in general that page says it’s inherited…
My understanding is that to get iron overload, your body would need to absorb excess iron and store it. This happens with haemochromatosis over a long time (30+ years), but it can also happen if you consume way too much iron by, for example, taking too many iron supplements when you don't need them. In normal circumstances and with a standard diet, the body will regulate it's iron intake so that too much doesn't get stored and so there's no iron oberload.
Maybe I'm missing something here, but this leaves me a little confused about what the commenter meant. If you have a normal diet and don't have haemochromatosis or some other confounding factor, I don't see how enough iron could be leached from a cast iron pot to cause iron overload.
It makes no sense to fixate on elemental iron residue from your cast iron pan, especially if you're still getting heme iron infusions from red meat.
Anyone who doesn't lose blood somehow - for modern humans that usually means either menstruation or blood donation - should be careful of sources of excess iron in their diet. It's one reason why multivitamin supplements are often labelled as "for men" or "for women". The women's one will have iron.