roommates are a critical social developmental step in your life.
They teach you how to negotiate boundaries without a direct authority figure.
They teach you how to live in a common space with somebody else.
roommates teach you that you must be responsible for your actions which affect the other people who live with you.
roommates teach you the importance of financial responsibility because when the rent is due you both need to pay up.
You may be lazy You may not want to do the dishes, but you know if you take that messy ass plate and you just throw it in the sink it will become a mountain of dirty ass shit and you owe it to somebody else to do your part.
If both of you hold up your end of the bargain and perform 3 seconds of work to place that dish in the dishwasher it avoids this tragedy of the commons.
roommates teach you that self-discipline is critical for a tolerable society.