Well, it certainly makes things easier for us hobby programmers that make redistributable projects designed to run on shared servers. I can't count on people installing a framework or keeping a library up to date if they have no admin access to the server. A lot of PHP projects, like Wordpress, still aren't aimed at serious, large-scale enterprises. Don't assume the owners have shell access with enough permission to install dependencies.
I started working with PHP over a decade ago because it had a graphics library built directly into its core, so I could always depend on it being there. GDlib isn't great, but it works well enough for generating thumbnails. Saved me a lot of trouble trying to dick around with detecting ImageMagick or doing stupid shell calls that might not even work on hardened shared environments.
Granted, I only do small, trivial stuff, which is all I recommend PHP be used for.