You must think in terms of how many operations must be performed before the true sear is released. Every facet of a sear release takes time, and in the case of a set trigger, there are two sears released. The first one is the sear of the set trigger. Time is taken while the striking portion of the set trigger moves to hit the second sear that holds the valve striker or hammer. More time is then taken to actually release the propelling medium. What a set trigger allows is a very, very light trigger weight, without an extremely complicated mechanism that can hold a very strong sear/hammer combination, but release it with mere ounces. Ever millisecond that you add in time for the trigger to release the sear, then the propelling medium, you increase the amount of movement that you can introduce to the barrel. In fact, most set trigger systems are very simple in comparison to a fine match two stage or single stage trigger. The idea is to have the least amount of time from the releasing of the sear, to the pellet leaving the barrel, which I am sure you are aware of. This is where "Lock Time" truly applies, with set triggers vs. single/double stage triggers.
When you are long winded, is that a sign of Wisdom or Old Age?