Productive distraction is still distraction.
You can’t call something a distraction unless you know what it’s distracting you from. Know Your Immediate Task. Things you traditionally wouldn’t consider “distractions” can very much be a distraction if that’s not what you planned to do. If you give up self-care time to work on Work, for example. Or the other way around.
Avoiding productive distraction is one of the key benefits of Mental Time Blocking. You may also just be satisfying your need for Cognitive Closure rather than actually making progress on what’s most important. See also: Business is Laziness.