I don't use the word "diversion" with myself but, rather, "distraction." I distract myself from my anxiety or rumination on how "bad" things are (which has nothing to do with actual problems or avoidance) so I focus on something more positive and "interesting." I don't believe when we're working on our actual problems that we need diversion/distraction as they are usually of interest to us. I don't believe "resting" between bouts of working on a problem is bad and often avoidance can help in that way. If we can't let go of an actual problem (as opposed to a worry, which is always useless in that it is about something that might happen in the future) then I believe it needs facing. That's why we have recurring dreams/themes in our lives, to bring us to face an actual problem. Avoiding doesn't work and eventually I realize that and "give it up" and start working on the problem itself. But our emotions and energies ebb and flow and sometimes we do need to take a break. I don't feel that's a bad thing unless it gets habitual so we're breaking more than we're working :-)