And yet they'll still be 10 because that's when you start your Pokemon journey.
Although I suppose you don't HAVE to start at 10, like how you don't have to start driving at (your area's age for driving here).
Ya, I'm 17 next month, and I haven't event touched a driving manual. Also just like you don't HAVE to have love in your lifetime, or HAVE to drink ever... Wait, drinking is bad. :(