Exactly my thought. Maybe it's the "not invented here" syndrome?
We use Istio as Service Mesh and get the same result, using the same architecture as shown in the blog post (especially the part where each workload has a sidecar container running Flow).
From my experience in big tech, another reason is that OPS guys just cant resist the concept of eBPF, go all the way done trying to figure out what this beautiful technology can do and forgot what thery really wanted at the begining.
We use Istio as Service Mesh and get the same result, using the same architecture as shown in the blog post (especially the part where each workload has a sidecar container running Flow).