There are exceptions to every rule, but as a good *general* rule, in SD situations, the laser as de-escalation tool is in my opinion, largely a Hollywood myth.
A laser is not a flashlight, you do not use it to hunt around for targets in the dark. It's a target verification tool in poor lighting, and as mentioned above, from unconventional firing positions.
For a laser like the CT's, which are pressure activated, the laser is not a warning. When it comes on, I have already made the decision to shoot you, and am in the process of shooting you. There is no time to A) see the laser B) do the math C) surrender in any sort of visible manner. This also defeats the argument that lasers give away your position, when used properly, the laser is only on as my position is about to be given away by a whole lot of other noise and light.
I think it would be tactically unsound, and potentially disastrous, to "dot" someone and wait and see how they respond. That being said, in response to the OP, our first set of CT's were for wifes nightstand Sig, and we consider them money very well spent. They add a tremendous degree of surety to shooting in the dark / near dark from a "just woke up" state of mind.