No, this isn’t a cast iron thing. Using stainless pans, you can get nonstick effects that, in my experience, far outperform Teflon anyway. The process is called “spot seasoning.” I have cooked crispy, cheesy rice noodles with eggs with zero sticking.
I love my cast iron pans, but stainless is my daily go-to. Added bonus: use 100% copper wool to clean your stainless pan. The copper-coated wool at most grocery stores is problematic; you might get a few uses out of the coated garbage and then it starts shedding metal bits.
This is not, strictly speaking, true for eggs.
I’ve cooked eggs in stainless nearly every day for the last couple of decades. I can crack a few eggs in a properly prepared cold pan, and still get non stick effects, such that the food will slide right out without using a tool.
The level of heat which would require a high smoke point oil is generally much too high for cooking most styles of eggs anyway.
People should use whatever method works for them, I’m not judging, but high heat is not required for most styles of eggs.