And you ignored the entire reply didn’t you? It’s naive to think at the “one neck to choke level” that all decisions are made for purely technical reasons.
And for you to just say “it’s okay to be down an entire day” because of egress cost tells me that you have never done infrastructure requirements analysis at scale.
First you have to assess the cost of being down for a period of time, then you have to access RTO, RPO requirements and not all workloads have high egress costs - especially things like data lakes that may have a lot of ingress and processing costs, but relatively low egress costs.
I’ve done a lot of different cloud projects over the years from lift and shifts, to data lakes, to cloud call centers, to serverless, to ETL jobs, you can’t just blindly repeat “egress costs” in a vacuum without understanding use cases.