It does matter, as it serves partly to demonstrate the point that at a time when Chamberlain was proclaiming "peace in our time" he was purchasing huge numbers of aircraft to rearm the R.A.F, he was purchasing huge amounts on anti-aircraft guns and deploying them and he was building public air raid shelters on a large scale.
You have to put this into the political perspective of the era also, in the last election before the war the Labour Party (and I'm a Labour man) said at congress "if elected we will disband the army, disband the navy and disband the R.A.F, and then will turn and say to the world , go ahead do your worst" you also have to remember the argument he had at the dispatch box when as Chancellor Of The Exchequer with the opposition (Labour) about his rearmament program as opposed to welfare (principally hospitals) in which he was told that he would rather bury the sons of this land than protect it's babies (from memory again I'm afraid) to which he replied "you wish for us to offer defiance without defence, I say you cannot offer defiance unless you have a good defence" (again from memory), it's a simple and salient fact that under Chamberlain's premiership the country was actively engaged in rearmament, when his stated foreign policy was one of peace which furthermore went against his own wishes domestically as the economy was on the mend "it's so annoying as we should be going along so swimmingly now" he remarked privately.
Chamberlain was a peacetime politician (that was his failing once war broke out), Churchill (for all his rhetoric) was deeply unpopular before the war, and was equally unpopular after the war, that's why we got Atlee in 1945.