Because time and time again companies have said they will or won't do something and years later we see that they were not being truthful with their customers. This dig is not solely directed at Amazon, but pretty much every company where they just say "trust me" and you have no way to verify that trust.

AWS makes almost all of their money with enterprise customers, and violating these types of claims would absolutely not fly there. It would be a huge risk with very little benefits.