Yes, I do.

Minimize the aggregate pain, maximize the aggregate pleasure. If that means only one person gets the "good" experience at some point during the flight, well, we take the one over zero. We're adults and know that it is not because we hate the other person or want them to have a worse experience. That's just the way it works out some times.

The person in the easier/shorter line takes the bags and does something useful with the time saved, like refilling water bottles or such. The net is still a win for both of us.