Let me put that quote in a longer context:
But TIMTOWDI is a mixed bag, there is usually not more than one good way to do something, and which one it is depends on the context.
I guess it is the criticism of TIMTOWTDI that caused that knee jerk reaction - but please read that sentence up the the period. This is not an absolute statement - it says that in a given context there is usually one good way to do something - the meaning of context here is not defined so it can be as broad as you can. To characterise the whole article as a 'One True rant' is undeserved given that the author writes:
One thing to keep in mind is that just because you use immutability to your benefit it doesn't mean you need to use it all the time.
The more so that I don't see any remark of heated emotions that are the characteristic part of a rant
. This is so contrasting with your own style of writing presented above.