there could be a dozen reasons why she chose not to do it herself and chose to ask you, and in all honesty it is probably for the best. I would rather read a post on here about how someone was able to help someone in need, rather than read on the news how either a car had fallen on someone while attempting to change a tire, or worse yet have said tire fall off and cause an accident etc etc.
If they taught everything about everything in the world we would forever be in 'school'. There are certain skillsets, probably many, I chose to ignore or never learn. And I am sure even at her young age she may have certain skills that you perhaps have never taken the time to learn or understand.
All I'm saying is you never know, she might be able to teach YOU a thing or two