They are not exhaustive in their presentation of information. Systems are filled with caveats, amendments, and a plethora of delightful details that do not fit neatly into simple infographics. Artificial systems (and our understanding of natural systems) are also subject to change in ways that render diagrams imprecise, inaccurate, or otherwise unreliable.
Please keep in mind that I am a layperson making diagrams to solidify my own understanding of things. I make them to learn, not to teach. I share them because it's fun, and I hope they will help other students enjoy learning, too. There are better sources of information for rigorous study!
When seeking advice and/or information, talk to experts who are qualified to provide that service. Diagrams are no substitute for a trained professional.