people tend to see what they believe in, like here https://imram-kriya.com/what-is-prana/
It is about the difference of temperature, so, being under the sun for long time makes it more risky, even if the water is not so cold.
I added another link that maybe explains it better.
What you mention is also important, “entering water slowly…”
I added another source that relates alcohol and copious meal.
is not made up, reading this Wikipedia entry parents would say “better safe than sorry”
What about the education systems? One of those two countries are heavily denying basic science at schools, teaching creationism as something at the same level as evolutionism, letting religion pollute education, banning books from schools, teaching obsolete two genders theory, etc. Is the study short about the differences in education?
mine is: Let the FOSS be with you