Those are indeed similar situations, but your examples except the first one do not come from the article. So it is not clear why do you assume that everyone did not read beyond the headline.
If you dig into the article, it's evident that AWS is just trying to appease the UK's Competition and Markets Authority. To claim there's no competition would be a monumental blunder, like a government declaring there's no need for a military during a war. They don't really believe that on-prem is serious competition, but they pretend to in order to avoid litigation.