If a nation is conducting drone strikes on another nation's territory, the alternative is usually conventional forces at scale on the ground*.
As the Iraq occupation showed, conventional ground forces at scale cause an even larger number of civilian deaths.
So drone strikes, if kinetic intervention is pre-decided, are a less-bad option from a civilian casualty perspective.
* Granted, there might be a decision not to deploy conventional forces because of the risk / cost, but if there are regular drone strikes, it feels like the aggressor country is past that Rubicon.
Conventional forces aren't deployed in many instances where regular drone strikes are used, thus the country didn't feel it was the right risk/cost to deploy conventional forces.
At the very least, it's a statement that deserves more debate, and I'd point to the many examples of how reducing cost and risk tends to increase the rate of an activity.