My parents wouldn't let any of us drive until we demonstrated the ability to change a tire.
All three of us changed the tire and passed the test.
I have had many a flat, and while sometimes I've been lucky enough that a nice man has pulled over to help, other times I've changed that bad boy myself and gone on my merry way.
I assume the same thing applies to my brother, except I bet nice men don't pull over to help him since he's one himself.
However, my sister has NEVER changed a tire since she did it in the driveway that one weekend. She has always called whatever boyfriend she had at the time, and every one of 'em dealt with it for her.
My stepdad is the one that taught me to drive and he was much the same way. No license until I had driven an entire Michigan winter, learned to change the oil, spark plugs and tires.
Good for your sister. I have applied the same principle to learning how to start the lawn mower; I refused to.