I think that's spot on, it is all of the bells and whistles along with a fairly predictable management cost, even if you are new to AWS, that make it a safe choice for a big swath of the market.
Kudos to you for touching on containerization, I would just like to add that the many emerging platforms and tools (https://pbs.twimg.com/media/B33GFtNCUAE-vEX.png:large) are rapidly starting to provide an alternative to AWS that was not there before in their ability to realize more competitively priced hosting alternatives without sacrificing on administrative overhead.
Kudos to you for touching on containerization, I would just like to add that the many emerging platforms and tools (https://pbs.twimg.com/media/B33GFtNCUAE-vEX.png:large) are rapidly starting to provide an alternative to AWS that was not there before in their ability to realize more competitively priced hosting alternatives without sacrificing on administrative overhead.