For a plane stuck for 7 hours, there's a high chance at least one person was beyond merely "uncomfortable" and had an emergency situation. Non-working toilets alone for that long are pretty high on the priority list. Was there at least one baby/small infant on the plane? Did anybody have health issues?

It may be easy to think of this matter in terms of one's own needs as a fully healthy adult. However, I can't imagine all people on the plane fall into the category of "fully healthy adult". In this type of closed environment, problems of others become shared problems after a certain amount of time.