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.
Veritasium did a video on this topic a few days ago. I highly recommend it. There’s a bit of nuance here, from what I understand, regarding PTFE which is the chemical composition that Chemours markets as Teflon. The video talks about PTFE being rather inert, passing through our bodies if we ingest it. The real issue is heating the substance above 350° C (662° in freedom units).
I’m not an expert but I think it’s worth reading up on the subject. If there’s anyone else more read up on the subject please let me know if I’m wrong here.