Why does lena younger oppose her son walter's liquor store scheme?

She looks down upon it.

In _A Raisin in the Sun_ by Lorraine Hansberry, Walter Younger has a plan to open up a liquor store. Normally, a parent would support a child’s ambitions, but in the instance of Walter Younger this is not the case. His mother Lena Younger opposes his opening of a liquor store because she is morally opposed to the drinking of alcohol and looks down upon it and what it can lead to.