If you want to be pedantic about the sentence you took offense at it is actually true. There are operations that can only ber performed using Powershell. People have given examples in this thread. But that isn't the point.
What I should have written for that part was that most people google for solutions. I've done this in the past on Azure and you get a random assortment of answers. Click here, Powershell this there, do whatever. It's disjointed and takes you out of mental context. I could update the blog with more clarity but I don't think anyone will change their mind.
I've used Azure, GKE, AWS. It was played down a little in the blog, but I have used the non AKS parts of Azure pretty extensively. Have you tried GKE? My suspicion is that you've been stuck in a Microsoft world for a while.
Not everyone is a paid shill but some people have a lot invested in the Microsoft ecosystem and I can only assume that's the reason for some of the comments here. I do 100% believe the Microsoft PR team has posted in here at least once though :)