But what automation? I use my Kasa power strip as a simple way to turn off/on what needs to for feeding, water changes, etc. It's convenient but I don't see it is "automation" The only "automation" that I have on my setup is the ORP controller turns on/off at the set ORP level. However, it's not even run like that as it is set on a schedule via the Kasa app.
There a hundred reasons why a controller is a good thing and not just wanted but NEEDED by many. Those things magnify in importance based on what is at stake ($$) and your available time to sit in front of the tank and babysit it.
If you don't see the need then you aren't the target user, its as simple as that. And that's nothing to be ashamed of - it just is what it is. When you reach the point of being frustrated with failure or the inability to control or automate something you didn't see a previous need to control or automate you will then realize how important such controllers can be.