Automation write destroys clip structure. Why?

[MallorcaMalle]

In Ableton arrangement recording automation in realtime overrides the clip structure. I like to consolidate MIDI clips (CMD+J) and name them properly. When recording automation with MIDI controller or Push the clips boundries are overwritten.

Can anyone explain if there is a useful reason for this that I don't see? In other daws clips structure is untouched when writing automation.

[Rivanni]

Enable the Overdub button in the transport bar. The one to the right of the record button with the plus symbol.

[MallorcaMalle]

Yes of course I mean with overdub enabled it destroyes the clip boundries and clip naming. Else it would delete the MIDI data when writing automation.