Your ignorance is mind-boggling.
Not at all.
Please show me, in your vast self-stated knowledge, where I must agree to anything what so ever in order to use Linux or any other F/OSS on Linux. (since I think FireFox does provide the GPL at install time on Windows as a click-through)
There is none. Nada. Nicht. Zilch. Zero.
No click-throughs, no nags. Just a notice in the documentation: This software provided without warrantee of any kind, explicit or implied. Stallman's "Freedom 0" in fact. As you've styled yourself a widely experienced developer, I'm surprised you didn't know that.
Clearly you've never earned a penny as a developer in your life.
Unlike you, I have never claimed to be a developer. I don't make vast claims of expertise where I am not an expert.
Linux has one of the most tyrannical license agreements ever invented - the Gee Pee Ell!
Just digging yourself into a deeper hole.
The GPL is not an end-user licence agreement. Didn't you read the thread subject? You go on and on in other threads about how the subject is something this or something that, objecting to other people's variations and drift. But apparently you can't read the subject here.
The GPL covers re-use of the source code. You should read it some time, then you'd know that.