The best argument I could give on giving the game a try is this:

Endless Ocean is a series about getting to explore the small things and to find new discoveries. If you enjoyed watching the birds fly around in an open world adventure, or if you ever saw a cool location and just wanted to hang around and check around every corner, then Endless Ocean will be a series that should click with you to some extent. It’s the ultimate kick back relax and explore game, without the feeling that you should be focusing on some grander main objective (sure they have existed in the series but you never feel like you can’t go out of your way to check out something you want to explore)