As somebody who is interested in Stoic philosophy and who tries his best to practice the Stoic way of life, I have found the insights and teaching of Lao-Tzu, the founder of the philosophy of Daoism as inseparable from the Stoic teachings. Two intertwining philosophical views that complete one another. Where Stoicism fails in its rejection of mysticism, is where Daosim completes it in its spirituality, where Daoism fails in giving clear instruction, Stoicism is firm in the rules it's followers must follow to achieve their goals. The two philosophies carry a very similar message, and stem from the same roots, although they grow in the gardens of two different cultures, in the modern age they combine well into a full spiritual and philosophical approach to life.
When a man spends time with himself, he comes to know and appreciate himself more. When meeting a new acquaintance, we often undervalue them because we know so little about them, once we sit one-to-one with that person, and we get to know them a little better, their true value and virtue is revealed to us, and they might even become so dear to us that we may call them friends, thus this also happens to ourselves, the less time we spend alone with our own self and our own thoughts, the less we value ourselves, and by spending time alone we get to know ourselves better and to see and judge our own virtues and sins to our own standards, thus we become more dear to ourselves and our own inner-self becomes our friend.
Having focus is the main trait a man needs to have in order to achieve his goals, along with a good work ethic and clear purpose, a man can achieve anything he focuses on. This is a cardinal step in becoming the best men we can be and the one thing that will serve us well in many different situations.
All in all, going to any extreme of having or not having isn't going to bring you any happiness or fulfillment in life, but I sure think every man who is trying to become the best alpha man he can be needs to adopt at least the key aspects of the minimalist mindset, clutter in your life transforms to clutter in your mind which blocks you from growing and reaching your full potential as a man. Try the minimalist experiment for at least three days, and see how this lifestyle works for you, it might open your mind for new perspectives, or at least create a better and clearer living space in your day-to-day life.