What is the easiest way to download the GPX/FIT of an activity to your mobile?

What is the easiest way to download the GPX/FIT of a saved activity to your mobile?

AFAIK, neither mobile version of the Garmin Connect website nor the Garmin Connect Mobile app offer this option. It would be so nice!

PS: I'm afraid there are reasons for Garmin not to do so, since it shouldn't be very difficult, technically speaking. If this is the case, could someone explain?

EDIT: I know this isn't a Connect IQ question exactly, but some of us are working on projects which involve GPX files and we get feedback from users about it. So I thought it could be a good place to discuss that.