That would literally force teams to fight if they wanted to unlock a Terror (as getting 100 would only be possible within a single night), which would be good, but it might also lead to games where the seeds keep spoiling and nobody gets an objective.
In a way, it shares some characteristics with BhB in why it was unpopular or permanently banned in pro play: You could grab and/or activate the objective without ever really fighting the enemy team. That doesn’t make for fun to watch eSports at least for the general public.
Haunted Mines wasn’t too far from this dynamic either: Both teams killing the small golems and avoiding the boss as long as possible, then spawning 40-60 strength golems each. Making it more lucrative to even ignore the golems and push with a Sylvanas or other macro hero and get camps during objective.