I would not be so harsh on biologists, but I do agree that we waste far too much time arguing over garbage like this. As I used to tell my students taxonomy is just a tool to help humans make some sense of all the complexity in living systems, but it is not real.
I think that if the taxonomy is based on evolutionary paths, it's somewhat more "real" compared to the "looks alike" sense. The evolutionary paths could potentially give some insights, while grouping similar but genetically unrelated species is just a confusion in that sense.
On the other hand - classifying things based on their genome does not really help us understand the biomes.
