Ops talent has really dumbed down over the last decade or so (sorry no polite way to say it). Long gone are the days when the ops engineers were talented devs who just liked hanging out at datacenters. Nowadays most of them are just button pushers who are good for standing up SaaS stacks or other simple tasks, but I'd never ask any I've dealt with in the last ten years to build out a datacenter presence from nothing. Most have never set foot in a datacenter. On top of that, most modern ops teams have been downsized (thanks to cloud) that they wouldn't have the hands to get the job done.
Even for good ops people, it can be very hard to capacity-plan and understand what appropriate/affordable/useful hardware is. Most ops folks today have probably never purchased servers for production deployments.
AWS will be happy to welcome these companies back after their on-prem dreams die.