@sharutiaburaddofouren Read the context of the verse, unless you also believe calling people "teacher" is wrong. The point is likely about destroying false hierarchy that led to Pharisee behavior.
>8But you are not to be called ‘Rabbi,’ for you have one Teacher, and you are all brothers. 9And do not call anyone on earth your father, for you have one Father, who is in heaven. 10Nor are you to be called instructors, for you have one Instructor, the Christ. 11The greatest among you shall be your servant. 12For whoever exalts himself will be humbled, and whoever humbles himself will be exalted.