I think you're misreading what was exchanged. That is unless you're arguing with him about the intent behind the design of a product you had no part in creating. He was replying to "The point of PowerShell..." not, "The point of shells...". He was simply correcting someone who misinterpreted the intent.

I think you're also reading tone into his message that's not there. He's been very chill and helpful in this thread even in reply to open hostility.

I'm not sure what "according to you" means, but you can verify it yourself. Feel free to read Wikipedia or you can probably find one of his talks about it on youtube.