Most people in political leadership are men, but it is not gender specific. There are women in leadership as well. As far as I can see, neither are much good at it these days. There are a number of reasons.
Candidates running for election put themselves forward. The things that they say about themselves, and all the policies and promises that they make, are never examined in fine detail. Nothing is checked, or very little is checked.
Ideologies are promoted without examining where those ideologies will lead in the medium to longer term. An example is the ‘stop climate change’ movement. That might have been relevant in the 50s and 60s, but today, with climate change upon us, it is no longer possible to stop it, and if there is a possibility of eliminating some of the effects, those outcomes will only be visible in 500 or 600 years. To reverse it completely would take a 1000 years. Essentially, the likelihood of getting 195 countries to drop all textile production made from oil (plastics), all buildings made of concrete, all forms of transport that emit carbon dioxide is impossible. There is no country on earth that will do this, nevermind all 195 countrties within the next few years.
There are no standards or qualifications required to run for leadership. Many leaders are elected based on their promises, their oratory, or agency advertising. This means that liars, crooks, rapists, criminals, idiots, and nincompoops can be either your local politician or your president. While someone applying for a CEO position for a major corporation has to go through countless psychometry and IQ tests, people running for office don’t have to meet any requirements.
Far too much power is put into the hands of too few people. For example, 150 years ago, there were about 39 million people in America. One person plus a house and a senate to make decisions for 39 million people is very different to one person and a house and a senate making decisions for 350 million people. To draw an analogy, two parents bringing up two kids would have to make very different decisions if they had ten kids instead of two kids. When that much power is put into the hands of only a few people, it bends their brains. Studies have shown that when people have too much power, their perspectives and values change in a negative way. Consequently, anyone whom we elect to a powerful leadership position will eventually succumb to brain injury, idiocy, and psychopathy.
For many more reasons, we have poor leadership in the west today. While democracy in previous times may have produced better leaders, that is highly unlikely to happen today. To go back to the analogy on the difference of raising two children and raising ten children, If one has two, one only has to cater to two sets of interests (childrn, people, can cultures different). If one has ten children, things become very different. They are all on different paths because they are different people. When there are multicultural societies, and where there are self-interested societies (individualism), plus leaders who have succumbed to the effects of power, nothing good will come of it.