Sometimes artist likes to draw detail to their drawing when it’s not needed. These examples of scene illustrations are simple and without any tones or intricate rendering. This is how I love to draw scenes when it’s going to be used for a presentation.
Not just it is clean looking, it also conveys clearly the thought of the illustrtation. My take is that when the drawing already clearly says what it needs to say, then it’s job is done. No need to add any more details when it’s not neccessary.
These illustrations were done digitally. I sketch in Photoshop and ink in Paint tool Sai. Sometimes I use Clip studio paint.