When I started my PPC journey, I had the same thoughts after 3–4 years.
People around me used to say that automation would make survival difficult and PPC roles would not last long. This was back in 2012–13, we were even running Orkut ads at that time but if you look at where we are today, the reality is very different.
New features and automation have always been part of PPC. Earlier they came in one form, today they come in another, and they will continue to evolve in the future as well. The role does not disappear, it changes.
If you enjoy the work, understand business goals, and keep adapting, there is no reason to worry.
PPC is not going anywhere, it just keeps asking us to grow with it.