But "Enterprise" as an altered timeline is at least implicit in part of its premise, the "Temporal cold war". I believe that were it not for the mechinations of "Future Guy" and other factions the events of Archer's era would have flowed into Kirk's era as we've seen it, not maybe not as much.
Nope, the TCW is just a plot device. It doesn't change the path of history from leading to TOS. If anything the TCW front in Archers era has to lead to TOS. If those events didn't happen, then TOS wouldn't exist
as we know it. As King Daniel
pointed out, a prequel that doesn't
lead into TOS is pointless.