The direction of sleep in modern research and among the sages

Hello Rabbi,
I recently came across a video in which someone claims that there is a modern study that recommends placing the bed in the north-south direction rather than east-west. The name of the study is: “Bedroom Design Orientation and Sleep Electroencephalography Signals.” The study concludes by writing:

The present study findings provide evidence that bed orientation influences sleep EEG signals and sleeping towards the EMF (NS) can have some positive effects on the sleep EEG.

This immediately reminded me of the Gemara in Berakot Ha-Ha 2:

Tanya, Abba Binyamin says: I have been sorry for two things all my life – for my prayer to be in front of my bed, and for my bed to be placed between north and south. For my prayer to be in front of my bed – is it in front of my bed? Or is it literally in front of my bed – and Rav Yehuda said, Rav and Itima Rabbi Yehoshua ben Levi said: How can a person who prays not have something between him and the wall – as it is said: And Hezekiah turned his face to the wall and prayed. Not in front of my bed, but in front of my bed. For my bed to be placed between north and south – as Rabbi Hama the son of Rabbi Hanina said, Rabbi Yitzchak said: Whoever places his bed between north and south will have male children, as it is said: And your belly will be filled with sons, they will be satisfied with sons. Rav Nachman bar Yitzchak said: Nor does his wife miscarry; it is written here: And your belly will be filled with sons, and it is written that the barren and her days to give birth are fulfilled, and behold, the barren are in her womb.

I wanted to ask you about this: Is this a coincidence? Or maybe the sages had special understandings about human nature?
Best regards,