This is automation of the lowest tier of support. The people who are expected to follow a script, and not deviate from it. That also happens to be the entry level into the profession for a lot of graduates, but that will shift now.
As you note, the higher tiers will at best get support from LLM's, as there is no way to make an LLM flexible enough, and also because that's where a friendly voice is important.
I expect that the same thing will happen that has happened every time we've had automation enter a field. The demand for the service provided will skyrocket, meaning the end result is even more people employed than before, though in roles where they are supported by heavy automation. That will take a few years, but it's been the norm, and I see no reason to expect it to be different this time around.
At that time, the new entry level for graduates will be higher up in the chain, or in something new that grows out of an abundance of automation. Hard to say at this point, as this is all new, but considering that we're still building software as if it's the 1960's, we're overdue for a massive shift.