To save money for sure. Also because it’s fun and rewarding and may be healthier than purchased tobacco.
Tobacco you buy in shops contain chemicals, chemicals that make it taste better. Chemicals that give you a hit quicker. Not to mention the preservatives, which maybe safe in food, but when smoked ..well. You can work out the rest.
We call these Government approved tobacco because throughout the western world, governments allow their partners in the tobacco industry to adulterate their tobacco with any one or more of over 1,000 extra ingredients.