You want to maintain slightly soiled items rather than trashed items. It's just better work.
The before photo doesn't look bad, and most people would live with that floor. The second photo shows it could be better and a lot of people will see their floor could be better and book what will be an easy cleaning for you.
If you show trashed floors, the person with light soil can see that, comparatively, their floor still looks great so doesn't need cleaning yet.
PS: If you show how you resurrect trashed items, you'll get customers that call only when things get trashed, and may expect the miracle in your photos.