Not sure how representative this is of people actually writing code.
I run a bunch of websites doing various little things. One is a Wordpress blog. I wanted a blog-like site so that myself and a few non-technical friends could write and publish articles on a particular subject. The easiest and most reliable and well-supported solution was to just install Wordpress. Throw in a few plugins from the Wordpress repo for any functionality it doesn't already have.
I don't understand PHP particular well, and don't feel very inclined to learn it. But hey, I don't need to, Wordpress already works fine, and there's probably already a plugin to do anything I might reasonably want to code up.
I find some of the security practices disturbing - it seems to be standard practice for the web process to have full write access to all the code files and the database. If anyone ever compromises the server code, guess they have full access to pretty much everything. But whatever, it's a standalone server with nothing but the blog. I have an Ansible playbook for the setup, so I can kill it and spin up a new one if it ever breaks.
So there you go, I'm responsible for a PHP site without writing any PHP. Probably lists like this represent a lot more low-skill deployments of existing proven codebases than bespoke projects.
There's probably something going on about ease of deployment too. I much prefer writing Ruby/Rails apps, but I don't actually know of any existing ones that I'd say are easy to do a low-skill deployment of in the way that PHP is. The nice part about things that are terrible from a security standpoint like the web process doing all upgrades and plugin installs is that it makes it much easier for less-technical people to deploy and manage it. Or people who are high-skill, but don't feel like applying all their skills towards a task that already has a straightforward solution.