You are external to the AI service, if you break the AI service you are still around to fix it. The consequences are relatively minor and easily remedied. Chesterton fence is about maintaining society, if you break that you may not be around to fix it so it stays broken, the consequence is major and not easily remedied. To force a software analogy; it would be like working on your autopilot software while you're flying on the same autopilot software - you're going to want to be very very careful when making changes.