Was there a process in place to prevent the deployment that caused this?

No: blame the higher up

Yes: blame the dev that didn’t follow process

Of course there are other intricacies, like if they did follow a process and perform testing, and this still occurred, but in general…

“The ability to disable the…feature during the setup process…” does not mean opt in, that means opt out.

Knowing windows setup, you need to click customize during the setup process and then go through several setup pages before you’re presented this option (or have to dig into additional/advanced settings to find it).

Most people won’t do this, won’t know how to do this, or will receive the pc with the initial setup complete and won’t know if this is on or off.