Works perfectly (see image below).
I think what's going on (just a guess) is that you weren't following the example in the topic step by step, so instead of creating a new map in the main part of the project and dropping the linked drawing into that map, you just opened the drawing and tried to work on that.
The difference between the two is that if you follow the topic exactly, you create a map in the main part of the project, which is writeable, and then when you go to create a new image as a result of kriging, the transform template can write that image (when you press Add Component) to the project.
In contrast, if you just open the linked drawing, the context is the inside of the las file, and you can't write an image into that, so there is no option to add a component.
See the discussion in the Project Pane topic, under "Portals to Other Worlds" and subsequent, where there are illustrations of how a project pane can contain sections that are not writeable, etc.