The important thing to understand about AWS (or Azure or GCP, for that matter) is that you're not eliminating learning how to deploy and use an OS underneath your apps, you're just using a different (sometimes better/easier, but always more proprietary) KIND of OS. Because that's what these cloud platforms are - replacements for the OS in the modern distributed world.

They can offer awesome leverage and benefit. They can also be horrible traps that can break a company. I've seen both. As Doug Comer once told me, Unix is a Power Tool. Power Tools can kill. So can cloud platforms. There is nothing new under the sun...