Comment by teh_klev

Re-read the article. Different teas require different preparations for "best results". Some teas work better with boiling water, others with lower temperature water.

What I took from the article was that there appears to be a rule (I am imagining because I'm not a green tea expert) that green tea should never be prepared using boiling water when in fact, as the writer states, is false. As in "it depends".

And near the end of the article they state:

"However, you should prepare tea in the way that works best for you. If you want to boil your sencha because you want it to be very bitter and astringent, by all means go ahead."

I don't see any contradictions.

It's like coffee, different beans, different roasting of those beans, different grinding of those beans will mean there is no one true way to get the best extraction, and your preferred extraction might differ from another's extraction method.