Makes no difference to me, it's still way better than using a commercial OS

No OS available is free from flaws, and Debian, just like the commercial OS's, has a list of issues to fix.  The difference is, those issues aren't hidden from you, the code is publicly auditable, and for that reason alone you know it's not designed to screw you.  If an intentionally malicious feature ever got into Debian, that would ruin it's reputation, and as Debian has a reputation for security, that's good enough for me.

I don't think my system is inpenetrable, that would be bumb and unrealistic.  All I expect is to be able to use my computer, secure in the knowledge that I'm not using something that was designed to be a server to ship-off my data to a bunch of data-mining corporations.  Our user-data has nothing to do with those corporations, it's absolutely none of their business, so I'm not going to hand mine to them on a plate through using those custom designed data-mining servers they try to pass-off as an OS.

You're every bit as welcome to use one as Doric or anyone else is, and that's your choice, but I won't be.

For those who like to pay money to corporations so that they can be data-mined - there's MacOS, iOS, and Windows.
For everone else - there's Debian.