A Live Photo is really a photo, and a video of the seconds before and after that photo.
If you choose another part of those few seconds to be the photo part, you’re basically making a frame grab from a video the photo.
Frame grabs from video are of worse quality than a still photo.
Also posted this elsewhere in this thread. With Garmin you pay €19.99 for this per month*. That is almost as expensive as all of Apple One. Probably Apple can let scale play in their favor, but offering satellite coverage is not a rounding error.
* https://support.garmin.com/en-US/?faq=Z0mdgyBwqaAHP4QLy78UcA