I see your point definantly, but the way I look at it is that it wasn't just the end of Enterprise it was the culmination of the past 18 years of Trek being controlled by Berman and Braga. I've know doubt it will return to TV, but not for a while.
At the end of the day Enterprise was lucky to get a fourth season, even then it was allowed to finish it, remeber quantam leap being cancelled immediately?
It was a vitim of the network changing, the guys that loved the franchise left and they started buying crap. They even canceled smackdown. The fact that enterprise had over 90% syndication showed it was a popular show.