Low fiber can leave you feeling good in the short term but it has long term health implications, I've read. The book Fiber Fueled [1] talks about what happens with fiber in our gut and the impact on our bodies at a high level. The author (an MD GI doctor) provides the scientific background for his claims for those that want it.

[1] https://www.amazon.com/Fiber-Fueled-Plant-Based-Optimizing-M...