Yes I do agree that a lot of cisgender people don't want to deal with the extra considerations transgender people have in their lives (such as requiring Dr visits and blood tests, hormone levels straightened out, saving up for surgery, different than usual genitals) but then again many of them do. It's just the odds. Bout the same as the odds of finding someone who is into a relationship with someone who has other major factors in their life, such as physical limitations or a job where they are often away on business or infertility or something else. Some people can't deal with added stress or factors to consider financially, or when planning trips, or just day to day.
That said, the partners who ARE okay with it and do stick around, I have found tend to be the most giving people and will work harder, give more, make sacrifices, and work together. They are just in general better people, and their satisfaction and ability to handle their life means they can handle things with other people too. Ever heard of how people who do charity work and donations are happier? I don't think they're happier because they give, I think they are able and willing to give because they are happier and less caught up in stress and personal issues. This makes them able to deal with problems larger than themselves, or help those who need help and make room in their life for things that require a little more effort.
Sadly I too would probably be more inclined to be with a cisgendered male rather than a transman but NOT because of attractiveness. Because even though I don't ever want kids, I just like the one biological ability that only cisgender and not transmen have. Then again there are creative ways around that with toys, so it would depend on the person and how much I loved them. After all, I would stay with my current partner even if he lost his erotic ability and even if he were suffering even more severe problems, so I guess it really comes down to this:
What matters when you first meet someone doesn't matter so much once you already love them, and all that 'initial attraction and excitement' junk goes right out the window when faced with dating a new person or being with the love of your life.
Online dating is a great way to get close to people who can learn to love you for who you are, not what is or isn't downstairs, and then once you've got the connection that doesn't matter nearly as much. On the other hand, if things don't work out so well all you have to do is block their email or number and there's way less risk of being stalked or outed to everyone that you know.