Categorization attempts are still helpful, categorization attempts are not pointless.

The amount of genetic differences don't matter - that's the confusion here. It's about specific shared genes that groups have which can indicate future possible options.

Looking for clusters of genetics which tend to be linked to other genetics is what's helpful. Upon doing so, we find that outward appearance features often have links towards other genetic clusters. Doctors can look at finnish genetics and know there's an 80% greater odds of ear infections due to inner ear shapes in finnish people. There's value to study these genetic cluster patterns - whichever label those clusters gain.

Stop spreading misinformation.