Lasers have a tactical place just like other sighting systems.
I wouldn't go without night sights on any pistol. The addition of a laser is a technology that should not replace tactical instinctive shooting with iron sights but supplement the ability to point shoot , if needed, when you are not in a position to align your iron/night sights with your intended target.
Example: You are confronted from behind and your knocked silly by a club and your suddenly on the ground wondering what just happened. Your only chance, with fuzzy vision, is to get to your pistol, point laser designator on target and squeeze trigger. This shot is going to be non-conventional in nature, from your hip, laying on your back, your side, etc.
It's a supplement, not a primary sight system.
"When a government robs Peter to pay Paul it will alway's have the support of Paul" George Bernard Shaw