It's absolutely not seismic. If you've used AI for a little bit, you'll realize it's good at writing boilerplate code. Any complex logic, and you better re-read and correct the code a few times until you trust it.

Of course if all you do is "host wordpress website" (like 80% of what's "webdev" do), it will work. Now the issue is that the last 20% are the hardest to cover, and current AI methods will not get there (you need some much more complex methods, like being able to integrate logic with learning-based ML, to do this)