This, in particular, is a big motivator and rewarding factor in getting local setup and working. Turning off the internet and seeing everything run end to end is a joy
We might be talking about two different things. Yes, under normal circumstances the setup steps involve software that defaults to using telemetry -- though I'd be surprised if it's not possible anymore to achieve those in an air-gapped env using e.g. offline installers, zipped repos and wheel files, etc.
My comment was referring to runtime workloads having no telemetry (because I unplugged the internet)