One way to view it is dealing with childhood trauma is necessary but not sufficient to fixing interpersonal issues. The problem there is there are at least three opportunities for common errors of reason.
if you have unresolved childhood trauma (people forget this is conditional) then resolving it is one of (not all) the requirements for fixing chronic interpersonal issues you may have (not everyone does).
If they make all those mistakes at once, you get people telling you to heal your childhood trauma to fix your relationship disasters and it's like "I had one argument with one person. I'm just gonna go talk to him about it..."
if you have unresolved childhood trauma (people forget this is conditional) then resolving it is one of (not all) the requirements for fixing chronic interpersonal issues you may have (not everyone does).
If they make all those mistakes at once, you get people telling you to heal your childhood trauma to fix your relationship disasters and it's like "I had one argument with one person. I'm just gonna go talk to him about it..."