In my mind, one of the big (but seldomly discussed) pros for using AWS and especially their high-level services (especially WRT containers) is that they allow rank-and-file developers to do a lot more of the work that was traditionally considered 'ops'. This is advantageous because developer teams don't need to coordinate with a single ops team when they need something, which allows the whole organization to be more agile. Another advantage is that you don't have to hire and develop a high functioning ops competency in your business--you can outsource much of that to AWS and focus your time/resources on more valuable opportunities (in general, I wish the on-prem side of the debate would acknowledge opportunity costs in their talking points).