That's an excellent point, and one I think is often missed. These are decisions made by commanders in the field in a short amount of time, with limited information. They have many concerns, worries, and instructions to comply with. What if it was misidentified as a Russian plane? What if they did nothing, and the plane dropped bombs on a Turkish village? There's lots of potential outcomes, limited information, and consequences and repercussions far beyond the event itself. And it's a mistake to think national leaders are involved directly in this process.
To give my personal views for a moment here, this is why it's so important they recognize, that whenever force is involved, regardless of intent, aim, or goal, it's messy, and things like this will occur, without fail. There will be accidents, without fail.