Personal trainer?

Your teacher is not a personal trainer.
They are not obligated to please you or give you what you ask for.

Tai chi cannot be taught piecemeal.
You cannot pick and choose how and what to study.

If a martial arts teacher had to choose between bowing to the demands of the consumer marketplace or closing their school to the public, many would close their school.
Teaching hand-picked students is better than diluting the art.