Lazy Physicists

I was studying Electricity at school and realized how lazy these physicists were. When they thought that actually protons were travelling to make electricity they did several experiments and made the convention. But when it was found out that actually electrons were flowing they said that now we have made the whole convention and we cant do thoses experiments all over again. So now when study electricity in school it is all the more confusing becaue we know that the electrical current is flowing opposite to the conventional current and all the laws and theories are on conventional. These Lazy Physicists.