Dear Conditional,
You and your human just have different fetch levels. I'd suggest you find another human, a neighbor kid or the like, who likes to play fetch and take out some of your fetch tension with them. Your human shouldn't feel like you're cheating, as long as you still do the 3 hours a day that your human seems comfortable with. Mismatched fetch levels can cause a strain on a relationship, but just be aware of that and keep your lines of communication open.
-Abby