Adding NEW gain edit points on several tracks simultaneously

OK, I remembered this “link channels” function and I linked all the 5 tracks by ALL the possible parameters but it’s no good.;;; When have tracks linked, and I add a new Volume edit point on the first track, the other 4 tracks will not respond to that.

Of course they respond when I have playback enabled and move a fader but that’s not what I want. I want to be able to add a NEW EDIT POINT on several tracks at the same position on one go.

I thought that LINK CHANNELS function would naturally do that but unfortunately it doesn’t.

I’m not willing to route those tracks to a group channel since I have to do some other things with them also, so please help me - am I missing something? Shouldn’t adding multiple edit points simultaneously be a self-evident feature?