There is still benefit for non-Infra people. But non-Infra people don't understand system design, so the benefits are limited. Imagine a "mechanic AI". Yes, you could ask it all sorts of mechanic questions, and maybe it could even do some work on the car. But if you wanted to, say, replace the entire engine with a different one, that is a systemic change and has farther reaching implications than an AI will explain, much less perform competently. You need a mechanic to stop you and say, uh, no, please don't change the engine; explain to me what you're trying to do and I'll help you find a better solution. Then you need a real mechanic to manage changing the tires on the moving bus so it doesn't crash into the school. But having an AI could make the mechanic do all of that smoother.
Another thing I'd love to see more AI use of, is people asking the AI for advice. Most devs seem to avoid asking Infra people for architectural/design advice. This leads to them putting together a system using their limited knowledge, and it turns out to be an inferior design to what an Infra person would have suggested. Hopefully they will ask AI for advice in the future.