These people are disagreeing with each other.

"Teachers are most important. You need us to learn," says teacher.

"Builders are most important. You need houses," says builder.

"Carpenters are most important. You need furniture," says carpenter.

"Doctors are most important. You need us to get well."

"Farmers are most important. You need us for food."

"Students are most important!" says the student.

"Because you were all students first!"

Now everyone agrees.