Maybe the mycelium knows it is up against a tough opponent, technically the myc colonized all it could, then it gives its fruits. It runs out of nutrition then its fruits to find nutrition elsewhere. "Fruiting conditions" to me is optimal environment for the mushrooms to grow nice and appealing. Right or wrong?
The only time "fruiting conditions" really matter is if you are using a martha or something... A lot of the old timers on here,, including myself, use the same conditions to colonize as we do fruit. My space gets up to 73-75F in summer and as low as 60-65F in the winter... My jars are on one set of shelves, spawn running in bags on a shelf, and bags actively fruiting on a shelf... They all get the same light, same temp, same everything... I've been doing this a long time and I don't see any significant benefit from attempting to provide different conditions for different stages.
"Fruiting Conditions" gets confusing because people think they can force their subs to start fruiting or they think that they will not fruit if they don't provide specific conditions. They think that they need a specific amount of light, etc.. etc...
I provide conditions that are favorable for mushroom growth and the conditions are the same for all phases and I have great results.