The main problem to the average viewer or beginner and not the advanced like myself is unlike Golf, you can SEE how they made a course harder. They moved the starting position farther, they put in more sand traps, they raised the ruff and they placed the hole in the more difficult part of the green.
You can't SEE oil in bowling, and is just as difficult to interpet in your head. So unless they used colored oil, no one is going to be able to see it. So you ask the difference between Golf and Bowling, this is it. It's the only sport you can't see what your playing on!