All of those services are run by sysadmins using software, not by software themselves. They just moved up a level of abstraction (take a look at the SRE listings, places are crowded with trying to hire proper devops/SRE). They have become the utility, which is where my plumbing/eletrician analogy comes in.
You might argue this is just suggesting there is a greater demand for software engineers, and that may be true, but I would be very skeptical of someone saying sysadmins would be replaced. Why haven't we replaced plumbers/electricians? Clearly we have utilities/plumbing/wiring that has been deployed for decades with little to no maintenance? Yet the profession still exists. The reality is, it still takes these tradesmen to build new environments, and support the frequent changes that technology throws us.