What you're suggesting doesn't sound logical
I would think the guys making these decisions would not risk the rover on grandstanding. Clearly they spent some time considering the risks and benefits. They have more information than any of us and what they see partially down the side of the crater is worth taking a look at. The slope apears to be about 20% and they've tested simulations at 30%. I'd be very surprised if the excursion into the crater weren't successful.
