Why is winning the lottery not a good thing?

Why is winning the lottery not a good thing?
Winning very large amounts of money on the lottery can mean friends and family want some money, acquaintance's may expect money from you when you don't owe them any, and the distribution of money between people can cause friction between relationships because different people get more or less money. Also, any new friends you make cannot be trusted from then on - they may only be after your money.

Most people who win a large lottery prize have no idea how to manage that much money. They quit their jobs, thinking that the money will be enough to live on for the rest of their lives, without having actually done the arithmetic. They underestimate how much will be taken by taxes. They purchase larger homes and expensive cars, all of which increase their expenses, as they then have to pay much more for insurance and, in many places, property taxes. They become accustomed to their new lifestyle and start running up credit card balances. Before long, they discover that their expenses and their debt exceeds the income from their winnings. Many lottery winners end up bankrupt and unemployed.

Then, there are others who fall victim to con artists, alcohol and drugs.

A small number of wise lottery winners never tell anyone, quietly pay off their debts, invest the rest for retirement, and never change their lifestyle. Such people are not rare, but they are, by nature, not the type of people who play the lottery in the first place.