Blender Armatures Shapes

so basically blender should come with geometric presets for bones in armatures instead of having to add a new object and assign it to a bone as its shape? not a bad idea...

You can already use any 3D shape as a bone in your rigs.

Unless you can be more specific about what you're requesting, I'd say that you're proposing a feature that's been in Blender for quite some time now.

you are so lazy, just posting a youtube link without any explanation and proposal from your side

I am still new to rigging and I am planning to learn this soon. This kind of rigs are what is being used in the industry and it may have some advantages.

The addon rigify has some similar elements to this but I am not sure if it technically has the same implementations.