AMS On A1 Mini?

This may be a dumb question, but I'm fairly new to this and couldn't find an answer anywhere. I have an A1 Mini and don't understand what the AMS lite does. Doesn't the filament switching actually happened at the hot end? Is there any reason to buy the AMS lite or could I just add three more PTFE tubes to each of these holes and as long as I have somewhere to hold the filaments treat it like an AMS? Is the AMS lite anything more than a glorified filament rack?

This may be a dumb question, but I'm fairly new to this and couldn't find an answer anywhere. I have an A1 Mini and don't understand what the AMS lite does. Doesn't the filament switching actually happened at the hot end? Is there any reason to buy the AMS lite or could I just add three more PTFE tubes to each of these holes and as long as I have somewhere to hold the filaments treat it like an AMS? Is the AMS lite anything more than a glorified filament rack?