You are confusing quantity and quality. There are many more ways, including unskilled EB3 and DV, it's just too many people want to immigrate so, naturally, vis

You are confusing quantity and quality. There are many more ways, including unskilled EB3 and DV, it's just too many people want to immigrate so, naturally, visas with less requirements run out faster/ have longer wait. E.g. there are just 5 or 10 thousand EB3 unskilled spots per year and, while DV is 50K, a country that had too many immigrants in the previous year cannot participate on top of the enormous number of applications from the ones, who do participate.