Yeah, I'm someone who uses Codex, but I still use n8n and node-red for some automation stuff in my house.
n8n allows you to work at a higher level, and working at this level allows you to do things in a way that's more likely to be "correct". While it's not necessarily "difficult" to do integrations with Home Assistant or Discord or any of the million integrations that n8n has, it can still be error-prone, even for experienced developers.
With n8n, I'm pretty sure I could even have my parents set up and more importantly debug pipelines to control their thermostat or something. Even if I could get them to prompt Codex or Claude or something, I think it would be hard for them to debug the output if they had to.