I wanted to be a music teacher as I get to spend all day helping other people discover the joys of fiddling and making music.
I say “do what you have to do, to play what you want to play, and enjoy as much of the process as you can”. Technical exercises, exams, etc. are useful for helping students get comfortable with the instrument and the pressures of performance, but ultimately learning music is more than just a means to an end, and it’s better to wring as much joy and musicality as possible from each step of the journey than defer fulfilment in pursuit of unattainable perfection.