why in coloumbs law we use to take point charges?

Honestly I think it''s a stupid way to look at the whole thing, I never understood why it''s taught that way.

Coulomb''s law is valid for any distribution of charge, but when you have more than a single point charge you need to add up all the contributions of the individual charges to find the total field, either through a finite summation for finite charges, or through an integrations for a continuous distribution. The form of Coulomb''s law you''re familiar with is only valid for a point charge located at the origin, and the field only has a radial component, but you must remember that fields are vector fields.

                                                                                                                                                                Thank U Sir,