A lot of people here have built their whole professional careers around knowing AWS and deploying to it.
Moving away is an existential issue for them - this is why there's such pushback. A huge % of new developer and devops generation doesn't know anything about deploying software on bare metal or even other clouds and they're terrified about being unemployed.
meanwhile skills in operating systems, networking, and optimization are declining. Every system i've seen in the last 10 years or so has left huge cash on the table by not being aware of the basics.
That could have more to do with containerization than the cloud - and that was a goal if I recall.