I disagree with almost everything you've said here.
For starters, how does one define what is and isn't rewarding to the player? For some, it may be discovering new places on a map. It may be getting a powerful new item. Completing a story quest. Leveling up. Getting to the next cutscene. Experimenting with game mechanics. Meeting, and befriending new characters. Taking screenshots in a beautiful environment. I could go on all day. Literally any number of things may be rewarding to any number of people, so if you're going to make the general assertion that some of these games aren't rewarding (be it in short play sessions or otherwise), I'm here to tell you that you're wrong.
Oh Nvm then, I'll just try Mass effect Andromeda and hope people were wrong about it.
You go ahead and do that. It has the best combat in the entire franchise, so that alone might be plenty rewarding for you.