This is often a bone of contention, I see both sides to it so it's not myopic from my perspective. However, and this is where things tend to get people hot and flustered. There is already a monorail to the TTC, there is also a humongous ferry that leaves directly to it, so I think if people are guests at other resorts there are a number of options available to them that would more than facilitate their transportation needs. The issue is not with 'options' but the element of what people feel is 'value' or a perceived 'benefit' from staying at an advertised 'monorail' resort. Paying a huge premium in many instances is for proximity to the parks, this is a Disney led feeling based upon the prices the further you are away for the most part, its an integral part of their business plan. Obviously different hotels are close to different parks and attractions, but for the most part, the most expensive hotels tend to be located close to MK.
The huge advantage is the direct access to the parks via the monorail or ferry boat system. I think this is in essence one of the biggest draws but also one of the biggest sold benefits. As above, I am sure people who are staying on site further afield get off at the TTC and then on to their hotels etc... But if that is the case, wouldn't the TTC loop do the same? Wouldn't the Ferry boat do the same? Granted those lines tend to be a little longer, but it is somewhat frustrating not being able to get on a monorail to get to your resort based upon the premise that is what was sold to you to pony up the extra money in the first place. There's no getting around that. That said, I understand that everyone has a right to get home safely and using both makes things more efficient, if they stopped going to the TTC, people would still use it and go to the Poly and simply get off there so it wouldn't solve the problem, in fact it may even make it worse. The only way to truly make it a monorail resort only loop is to make people scan their bands.... and we all know the issues that would cause! lol So in short, I feel your pain and frustration, but unless there are drastic changes...... it is what it is lol..