Nope, just see it differently then you do. Well I do... I won't speak for the person you quoted, but I agree with them. It irks me when people don't take personal responsibility for themselves and their family members. If one needs a seat, then they need to do what they have to to get a seat. Wait for another bus/monorail, pay for a taxi, or rent a car.
This is why these threads never end well. People will never see eye to eye on these issues. Some see it as a manners issue and some see it as a personal responsibility issue.