It's a Picard thing: Jean-Luc burned his starship.
And then tried to do it again in "New Ground". One begins to wonder if the wall-of-flame fantasy in "Where No One" was that crewman's, or Picard's...
It's pretty difficult to imagine an effective futuristic fire suppression system. Fire, after all, is too darn similar to humans: both are based on combustion and require oxygen, heat, and hydrocarbons or other energetic chemicals in abundant supply.