Home Assistant is to HomeKit is very much like AppleScript/scripting languages are to Shortcuts. The UI based approach is OK, but only takes you so far because

Home Assistant is to HomeKit is very much like AppleScript/scripting languages are to Shortcuts. The UI based approach is OK, but only takes you so far because there is not proper investment to improve a deeper integration. To make the most and easiest management of the system often requires using a more capable system and bridging the two.