Profit maximization is usually a main aim of most businesses in the private sector.
1) Usually people invest personal savings into starting businesses so that the return (aka profits) can be greater than the investment and they can earn a better living.
2) If profit is earned then the business would have enough money to pay dividends to its investors/shareholders, otherwise it wouldn’t have enough money to give as dividends and it will lose its investors.
3) Profit is required for the business to survive in competitive markets.