Why are metal oxides basic and non - metallic oxides acidic in nature?

When a non-metal reacts with oxygen it leads to the production of non-metallic oxides. Examples of non-metallic oxides are: $C{O}_2,S{O}_2$,etc. Usually, non-metallic oxides are acidic in nature. It is because when they are reacted with water it leads to the formation of compounds which are acidic in nature.

Example: $S{O}_2+H_{2}O⟶H_{2}S{O}_3$
When a metal reacts with oxygen it leads to the production of metallic oxides. Examples of metallic oxides are: BaO, MgO. Usually, metallic oxides are basic in nature. It is because when they are reacted with water it leads to the formation of compounds which are basic in nature.
Example: $MgO+H_{2}O⟶Mg(OH{)}_2$