There is a /lot/ of bullshit myths around cast iron, like that you cannot use soap for instance, or shouldn't scrub it, both of which are totally fine, but the idea of seasoning and what occurs when it's done properly are entirely true. Most people just want to otherthink it. All you need to do with cast iron is use it and care for it properly, the longer and more often you use it, the better it gets.
But people who say you can easily cook eggs in it or everything else "after its seasoned" are just not to be listened to. Use a nonstick.
EDIT: Or carbon steel I guess. Even then, meh. Remember that the vast majority of professional chefs use nonstick skillets specifically for eggs both at home and in their workplace.
That said, one thing I have come to realize over the past couple of decades of cooking with cast iron is that seasoning is less some mystical ritual that is performed one time, and more a result of proper use and care of the pan over time.
But yes, there is lots of ritualized BS (“Don’t wash it”, “Never use dish soap”, “Only season it using flax oil in the oven at 200 degrees for four hours”, etc etc etc).
-In the very beginning, bake it in an oven with a very thin layer of crisco two times
-Only use it for eggs for a while, letting the butter turn into seasoning with higher heat as it cools. Find the right preheating ranges by experiment.
Now it's maintenance-free and nonstick.
Eww... You can and should wash your cast iron pans. Dish soap is no longer made with lye or other harsh chemicals, just use a bit of Dawn and a blue scrub pad (same you'd use on nonstick) and properly clean it, make sure it's very dry afterwards and put a very thin layer of oil. Also don't use paper towels on cast iron unless it's a smooth bottom pan, the modern style cast iron will cause shreds of paper to get embedded in the pan which will burn and get nasty (also paper towels are bleached and that's nasty).
[1] https://en.wikipedia.org/wiki/Seasoning_(cookware)
[2] https://sherylcanter.com/wordpress/2010/01/a-science-based-t...
Use the right tool for the job and cast iron is definitely not the right choice a lot of the time. Unless you exclusively cook meals where heat control is never needed, I don’t see why you’d only use cast iron.
After spending a few weeks trying, I’ve had multiple people tell me they got theirs ‘seasoned’ after three or four months.
Don’t let yourself be sucked in.