Maybe someday AI will replace developers. LLMs are neat but they aren't that great yet.
Software development in banking is second tier anyway. Usually people go to faang tier. If you are good enough, you could get double the pay as software engineer for props trading. You can double the pay again if you are good enough to be a trader, who needs to code btw
I don't think any aspiring software engineers want to work as the cost center in the banking sector unless they are paid accordingly
It's also much more dangerous to replace developers with an LLM than to replace your translator with Google Translate. Code that is close to correct often doesn't work at all. A bad translation can still be (mostly) comprehensible even if it makes your company look unprofessional and incompetent.