Because disabled individuals
must use the H-room (because they can't physically use roomettes), they would be forced to pay the full bedroom fare. BY LAW, they must be offered the lowest cost type of room on the train, thus they pay roomette prices.
I just ran into the same thing for my 99 year old grandmother (and an attendant - ME!) when buying theater show tickets. The handicapped seats are in the most expensive section of the theater, but the rest of the family will be sitting in a mid-priced section. When I enquired, they told me that by law they must offer me the seats at whatever price-level I ask (equivalent to other seats in the theater). So I asked to pay the mid-priced level. I could have asked the lowest level, but since the theater is a non-profit, I didn't want to rook them out of too much money.
It's only fair!!! (or fare?
)