Yes they a rather substantial drain on resources, and if you don't feel like you need them in your life and are content with it you should remain as you are.
However, most men have a deep-seated longing for affection and validation, and since there is a monopoly held on that by females it's integral for men to have a female partner. It's in our instincts to desire this type of relationship and your brain will assault you with emotional pain signals the longer you are socially isolated, as this emotional pain has evolved in human beings due to their status as a social animal.
The purpose is to get relief from this pain, and for most people materialistic positions aren't too much to gamble when compared to the reward. The reward isn't tangible, but it will have a passive effect on your levels of motivation and success.
View attachment 211620
But that's just my observation pewpew.