Clearly they didn't consider the Peasant's Revolt of 1381, Jack Cade's Revolt of 1450, or the entire 15th Century after the death of Henry V, or the Tudor Age, as periods of instability.
The Assize of Arms/Statute of Winchester limited bow and armour ownership in England, to those possessing over £2 in land or goods. A bit like telling anyone earning over £20k today that they must have a rifle and to add kevlar if they were earning over £30k. Henry VIII required that the above folk lock their weapons away in a parish armoury, rather than keep them in their own homes.
Eventually we might see a study that moves away from the longbow myth and actually bases its premise on the fact that; English armies after the first years of the HYW were wholly composed of professionals and paid volunteers, while the French (including the knights) were fulfilling a feudal obligation.
Once France gets professional too with its mercenary companies and ultimately its compagnies d'ordonnance, it starts winning. The only blot are the Franc-Archers later in the century after twenty years of dereliction.
Once the French King stopped requiring nobles to attend the Army, they stayed on their estates thereafter. 'French Chivalry' became a very small number of adventurous nobles and a much larger number of second sons from armigerous families, who had no other way of making a living.
As for the longbow, it was Henry VII (iirc) that banned the crossbow as an acceptable 'bow' to bring to muster. The so-called 'archery laws' of Edward III mention bows that shot 'arrows, bolts and pellets', the last two being crossbows. Meanwhile in Northern France and the Low Countries, shooting guilds dedicated to the longbow exist alongside those for the crossbow, over almost the entirety of the Middle Ages. The equivalent of local golf clubs today and about as exclusive.