[fartsucker69]

ECS can mean many things. the idea that you put components together (physically, in memory) and try to set up your processing so stuff is processed together may be quite natural.

but actual ECS systems add a lot of stuff on top that's not very natural (in any programming paradigm, not just OOP).

it's about enabling you to add and remove components at runtime, manage complicated relationships between entities and their components in a generic sense. this has all the advantages and disadvantages that those kinds of abstractions bring. bad if you don't need it, good if you do.