Pretty much. The argument in this thread is between people facing reality and people searching desperately for every possible excuse to remain in denial. It's rarely that clear cut, but this time it is.
I can't even blame the people who are in denial. It's like a little kid who is sitting there screaming that the ride isn't over despite the fact that the machine has stopped and everyone else is getting out. We're having so much fun we don't want it to end. But the ride is going to end soon whether we like it or not, and I really hope nobody in the franchise is in this kind of denial about it.
That said I have every confidence that Belichick in particular is facing the end with confidence in the plans he's been drawing up for years about how to manage the end of this particular ride and the transition to the next QB. Because Belichick is too pragmatic to be sentimental, and hanging onto Brady until HE's ready to go would be an ultimate expression of sentiment over sense.