That’s because linuxserver focuses on creating docker images for existing projects.
Usually if you check a product on linuxserver.io is because you know already the product and you want to find a good quality docker (docker compose) image.
All the github and docker pages from linuxserver have the same structure and after the generic intro they present the project.
Personally I love what they’re doing but I understand your confusion, it was the same for me when I first knew of the project.