When we add a modifier that can be influenced by a texture and want to use a texture; we have to add texture to the world or a brush to modify texture settings ( loading of an image, size of a voronoi texture, ramp of a blend texture).
I don't think it is obvious for a beginner.
We have to duplicate and pin Texture properties in a new area or window and remove texture in unpinned Texture Properties; if we want to tweak modelling while tweaking painting /rendering without a world or a brush using the texture.

Buttons of template for texture takes a lot of space in the modifier and there is often not enough space to read texture name with default Properties Editor size.

I know that everything would be nodeable in the future.
But I am posting if someone thinks it could be solved for the period before modifiers nodes will be finished and usable.