Teaching and other profession

Hello steemians i will really love to have and answer to this

What gives you joy will make you fulfill more than that which gives you money

If teaching gives me joy then why do I have to do it for a reward i remember back then when being a teacher was a noble something but what has happened today, parents before who were teachers encouraged their children to become teachers but it's totally the opposite today no love for the profession anymore .... But i still love it.... A nurse wants the children to be doctors, a parliamentary wants the child to be a great politician, a business man wants the child to become q CEO some day ...... But why is it that coming to a noble profession like teaching is the opposite .... I believe that the efforts put forward by the teachers on children is for more greater than that of parents ..... I ask again why is it different when it comes to teaching please i want to get and answer.....