As an amateur photographer, I (we) have the privilege of being able to chose the look we like the most, even on a per-image basis.
I'm not a fan of "grunge" and "selective color effects", but I do use the occasional bleach bypass (from scratch, not a pre-cooked effect) on a picture in a thousand.
I also noticed that the uglier a pic is (out of focus, blurred etc.) the better it gets with grunge effects!
A new way to save that good but technically terrible shot... or to mask your ineptitude and your cellphone's limits in other cases...
Saturation and desaturation both have their places... using only one or the other IMHO is like having a painter's palette full of colors and using only the yellow(s) or the red(s).