FT you say, "Winding is essential for babies the world over"
If by this you mean, 'virtually all babies wherever they live need special techniques to enable them to get rid of air in their digestive tract' then you are making sweeping statements.
You cannot know this, FT, and if you do know, then share how you know it.
I can't think I am being unreasonable in asking for evidence.
There are some sweeping statements we can make, because we know sufficient about physiology and anatomy etc etc to apply it to all babies everywhere.
So, for example, 'babies the world over need to be fed in order to grow' , or 'babies the world over wake at night' or 'babies the world over are unable to regulate their own body temperature well and need help to do this'....all statements based on evidence.