Unless we're talking game dev, real-time 3D graphics and such - then Windows is IMO unparalleled - I have not seen comparable tooling/driver support on other platforms - although I have not tried using Metal.
UNIX architecture is the "Worse is better" from OS architectures and POSIX is irrelevant when one uses programming languages with rich runtimes.
You're thinking on different abstraction layers - sure given a library for runtime X a REPL will be better than CLI, but when you're talking about processes then having functionality exposed via CLI vs Windows way of monolithic apps with GUI only - it's a huge difference for automation/testing/workarounds/re-usability/etc. - and you don't really care what the underlying platform/runtime is.
No need for UNIX CLI for it.
My point is that Windows has a culture of black box monolithic apps with GUI focused (if not GUI exclusive) functionality exposing. Nothing stopping you from exposing stuff like commandlets for PS and composing them to build higher level systems - but people don't really do this - and they do in UNIX systems - things end up being more transparent.
Nothing to do with any shell or anything really - more about UNIX philosophy of small focused apps composed together vs monolithic apps.
When you're developing stuff UNIX approach is IMO way preferable.
UNIX, is also full black box monolithic apps with GUI, there is a UNIX world out there beyond GNU/Linux and *BSD FOSS culture.
I don't deny there are developers that care about UNIX, and even I do care, occasionally.
What I don't accept is that for whatever reason now to be a developer one has to breathe UNIX, as if there wasn't anything else a developer might be.
This is yet another reason why sometimes I wish Apple had bought Be instead.