Because that worked really well in 1920s and 1930s Europe? Every time British and French politicians agreed to pull back their military presences, Germany and USSR increased them. Austria voted to join Germany and came to despise Germans for treating them as 2nd class citizens. Czechoslovakia collapsed without a single shot fired. Estonia, Latvia and Lithuania were forced to agree to join USSR because they knew that British Empire and France would never fight a war for them. Finland fought and lost a third of its land to USSR. Poland fought and lost practically everything. Can you tell anyone from those countries that the refusal of military presence by democratic nations had been good for them?