And the freedom is provided by removing your choice to use nonfree WiFi drivers. Leaving that decision to you with a warning of its implications (ala Debian) is not really freedom because you'll make the wrong choice.
Don't get me wrong, I'm a big fan of FOSS, but not of doublespeak.
This is context dependent.
Suppose I'm changing an existing laptop from Windows 10 to Debian for a user. Suppose I must install WiFi to convince the user the machine it as all useful. Suppose if I fail to get the machine to work, the user will eventually go out and get another Windows 10 machine.
In this case the right choice is to install from nonfree. It's a compromise, sure, but it's clearly less bad than the alternatives and leads to significantly more freedom than the user had before.
To not leave room in your philosophy for these cases-- and there are many-- is to create unnecessary rifts among allies. You're doing it right now by implying that Debian proponents aren't True Scotsman due to the existence of nonfree.
The problem with "free software" fundamentalists is they care more about the freedom of the software than the freedom of the user. Part of free choice from a user perspective is the freedom to run proprietary blobs. Also when it comes to freedom to run or not run proprietary software there is no such thing as a wrong choice, just a personal choice. I would prefer you not force your freedom on me, so that I can be free to do as I please.
GP's first two paragraphs are very clear irony.
No one is removing the freedom to use blobs. You can use them on PureOS, too (and I did). The difference is you will not run into proprietary software by mistake (which is possible on Debian).
> Also when it comes to freedom to run or not run proprietary software there is no such thing as a wrong choice, just a personal choice.
Most users never heard about free software and do not make a choice, just use whatever is installed. This is exactly how you make a wrong choice: unknowingly.
What you're discussing is really the level of convenience, and what that does to influence user behavior.