Keeping bare bottom tanks is a lot easier for people that are struggling with there fish or water quality, you get more time to concentrate on solving the problems you might have with your fish, water quality, or filtration instead of worrying about cleaning gravel and dealing with dead spots, trapped food e.t.c. . if you can eliminate anything from the long list of possible reasons that you are having problems that's got to be a good thing for people struggling.. I personally keep at least 7 of my tanks bare bottom as the maintenance is so much easier and maintaining a fishroom is a lot of work, I keep a lot of large fish aswell that can hurt them self on decorations. and let's face it the water clarity in bare bottom tanks is all ways going to be better.. allot of new people getting into the hobby don't understand how important it is to clean gravel and most don't bother.