When talking about security, people often don't quite understand the big picture. They often jump into the details and specifics without necessarily understanding or have a clear view of what overall context drives the need for their specific solutions. So often, it turns into a spaghetti that can of-course be served on the table, but no one know - Who asked for it, Why we are serving this, To whom beside how it comes together as a whole to make a perfect sense out of it. Neither anyone knows if it tastes good !
Here is a meta model as how things look like from a bird eye view perspective and should help you better connect the dots next time to make some sense of the security mess such as - Cyber security, Infra Security, Applications Security, Data Security, AI Security and so forth.
A more detailed view was shared earlier here.
And remember...