To be clear, I'm not advocating for this or trying to suggest it's a good thing. That's just reality as I see it.
If my site's offline at the same time as the BBC has front page articles about how AWS is down and it's broken half the internet... it makes it _really_ easy for me to avoid blame without actually addressing the problem.
I don't need to deflect blame from my customers. Chances are they've already run into several other broken services today, they've seen news articles about it, and all from third parties. By the time they notice my service is down, they probably won't even bother asking me about it.
I can definitely see this encouraging more centralization, yes.