I was recently asked by an industry colleague about the hyper-focus many folks in the WordPress ecosystem place on themes and plugins.
What my peer was talking about was something different than the drive to keep up with industry knowledge.
They had noticed that some people believe WordPress development is something similar to magic. If you need functionality for a site, there must be a plugin and/or theme that takes care of that need, and it appears from thin air.
This is a dangerous fallacy that exists in the world of WordPress. Yes, plugins and themes are great tools, but someone had to actually develop those tools before anyone could use them.
The more you know about development within a platform, the more you can achieve with that platform. WordPress is no different.