Doesn't have anything to do with the fact that Putin transformed the young post cold war democracy of Russia right back into a dictatorship and is now in a full scale war with another country and would have already invaded everything he thinks should be part of 'great Russia'.
A country needs an army because at any time there are just too many aggressors out there. Who that is exactly might change over time, right now Russia clearly is one of them. As the US threatened Greenland and it's raging war against Iran (which course itself is an aggressive dictatorship), it's also a current aggressor against which European countries need an army.
