Sittable does not extend any entity class

[NonSwag]

Expected behavior

As documented, Sittable applies to Animals and since all implementing classes of Sittable share the Animals class it should extend Animals

Observed/Actual behavior

Sittable does not extend any entity class

Steps/models to reproduce

Plugin and Datapack List

Paper version

This server is running Paper version 1.21.4-126-main@fb5b173 (2025-01-25T20:51:32Z) (Implementing API version 1.21.4-R0.1-SNAPSHOT)
You are running the latest version
Previous version: 1.21.4-121-88bbead (MC: 1.21.4)

Other

this makes it not possible to use sittable in generic contexts where you expect an instance of entity

[NonSwag]

The same problem applies to Attributable
I doubt attributes will ever be applicable to non entity objects