I've always been a fan on "standing on the shoulders of giants" and it's served me very well to have this mindset. I'm fine to dive deep when I have to but diving deep just to dive deep.... not so much.
Semi-recently I had need of a simple blog for a friends/family thing, I spun up a wordpress and mysql container and was done. Over a decade ago I used to setup and manage wordpress installs but it's not a skill I need.
I find this article a little odd since they talk about server admin but then also scripting setup script for your server which is more in the "cattle" category for me and less in the "pet" that I would consider "server administration".