Who said anything about doing it in your head? None of what I posted was easy to do just by looking at the data field. As I said, alpha 1 metrics are past the area of low hanging fruit. Having the computer analyze it for us can give much better results as evidence by adaptive training. Improving adaptive training requires more data into their calculations and models. (i.e. lots can be improved in the background without the user needing the understand why things are done a certain way)
If you only want to deal with the low hanging fruit, great. But that doesn’t mean we’ve reached the peak of what can be improved on so may as well stop doing research on how to further improve.