I agree - but you misunderstood my point. ... Hence the (correct) statement that flying in Class G never requires authorization is simpler to understand.
I've read all your posts in this thread and do not see that statement. Even if you had made that statement, it is not correct as Class G will go up to at least 700' AGL and without a structure nearby, you cannot be higher than 400' AGL - unless you have an authorization (or waiver).
What you have said is "Either you are in Class G or you are not - if not then you require authorization or waiver. That's all that counts for Part 107." and " Under Part 107, authorization is always required to fly in any airspace other than Class G - that includes flying in any Class E airspace."
I responded that was not correct.
Now if someone new to 107 does not understand surface Class E and the other rule of within 400' lateral of a structure for higher than 400' AGL and wants to confine themselves to strictly Class G and only up to 400' AGL to make sure they are legit, then that's something different.