To be fair, I don't have a problem with Te Reo, and I don't think it does, or will do, any harm to teach kids another language.
I learned French and Latin at school. Didn't hurt me at all - and Latin is a 'dead' language - although the basis for many spoken languages today. And what a buzz it was translating a passage actually written by Julius Caesar for a School C assignment.
Local rider Rohan Mudhoo speaks English, French, Creole and Hindi - and also understands Urdu. All Mauritian lads I have met can converse readily in at least three of those.
Scandinavian children are taught English [ or they were ] as a matter of course. Many from other jurisdictions - Singapore, Malaysia - know either English or French as the language of govt. and commerce, as well as native or local dialects.
The brain is not like the memory in a smartphone, getting clogged up with too much information and needing to be decluttered. There is room for a lot more than we store there.!
Many Kiwis I know don't even speak English well. Some exercise of the grey matter wouldn't hurt at all.
However, as I reflected above - while native practices, both medical and otherwise, should be respected, and learned about wherever possible - to shove knowledge gained through accepted trials and research to the back, and/or make it irrelevant or less important, is dangerous and stupid in the extreme. IMO.
And to end - the assertion in the initial article that modern medical science arose in western Europe in the 17th century, fails to recognise that Arab scholars and surgeons were active well before then with some very advanced knowledge indeed. I have seen evidence of cataract surgery carried out [ successfully ] much earlier, by an Arab surgeon in Spain.