The reasoning the article takes to reach its incorrect conclusion is plainly erroneous. For example, it reasons that "Northern latitudes have later onset of winter sunrise and higher prevalence of SAD, with the latter increasing by 0.2% per 1° increase in latitude," ignoring that northern latitudes also have less sunlight overall.
It does not ignore the fewer hours: it prioritizes them towards the morning, where it is more important for circadian rhythm reasons.
It even mentions public dislike of the lack of morning light in the most recent large-scale pDST experiment in a northern-latitude country
> Russia moved to pDST in 2011. Public dissatisfaction grew rapidly, particularly in northern regions, where winter morning darkness was even more prolonged, with critics citing disrupted biological rhythms, morning travel risks, and effects on daily functioning. The policy was reversed in 2014.[15]
See also comments with link dumps of position statements of various chronobiologist and sleep research societies:
* https://news.ycombinator.com/item?id=30691158
* https://news.ycombinator.com/item?id=30691237
The analysis itself has an Appendix which links to position papers:
* PDF: https://www.cmaj.ca/content/cmaj/suppl/2026/10/01/198.34.E13...
* https://www.cmaj.ca/content/198/34/E1335 / https://doi.org/10.1503/cmaj.261089