We didn't have to invent any homegrown orchestration tool. Our infra is hundreds of VMs across 4 regions.
Can you give an example of what you needed to do?
I wish luck to the imo fools chasing the "you may not need it" logic. The vacuum that attitude creates in its wake demands many many many complex & gnarly home-cooked solutions.
Can you? Sure, absolutely! But you are doing that on your own, glueing it all together every step of the way. There's no other glue layer anywhere remotely as integrative, that can universally bind to so much. The value is astronomical, imho.