Son Of Coco
Cricket Web: All-Time Legend
Possibly because a nightwatchman is used as a reaction to a certain situation (i.e., losing a wicket late in the day), not offered up as a solution to that happening in the first place. By this I mean that teams send out their openers as per usual with the mindset that a wicket isn't going to fall by the end of the day and they'll start off the next day as per usual. However, if a wicket does fall then some teams will try a nightwatchman approach to get them through to stumps if there's only a few overs left, this doesn't mean that sending out a nightwatchman straight off is the right approach, as you'd be adopting a negative stance from the outset and basically saying 'we expect to lose a wicket, so we'd rather you have this guy'.
You could just as easily ask 'why don't they send out two nightwatchmen to start the innings if there's only 5 overs left until the end of the day!?', most teams will leave things unchanged at the start of an innings as that provides stability and a positive approach.
You could just as easily ask 'why don't they send out two nightwatchmen to start the innings if there's only 5 overs left until the end of the day!?', most teams will leave things unchanged at the start of an innings as that provides stability and a positive approach.