Yes. I have some jobs that definitely warrant modelling in 3D and others that don’t. But I do them all in SU and then export to LO for presentation purposes.
I think the recent development of being able to make scaled drawings in LO is great but it has probably made people think it is a 2D CAD package and the companion to SU as a 3D package. It would have to be pretty much as powerful as AutoCad LT for that but it isn’t and isn’t really intended to be.
Here’s an example of how you might make really good use of the scaled drawing feature. Say you drew detailed plans in SU and exported them to LO. Now you want to add drainage runs, typically shown by dotted lines. SU is really poor when it comes to linestyles (something every AutoCad user is very familiar with). You want them to relate to the scale of your imported SU scene, so you draw them in scaled drawing in LO. Doing that will also automatically create a group which is handy. And it’s easy to alter the dotted line type, colour, thickness, etc.
As @DaveR has said, it also provides a great start if you ever do want to make a 3D model later.