My response to you would be "Why not?" "What do you have to lose?" "You never know until you try". The fact that they have accepted solo founders should be a reason in of itself to apply because there's a chance and I don't know about you but as a solo founder myself that chance is completely worth it. Even without acceptance there is so much to be learned from this process. Just filling out the application itself gets you thinking about aspects of your idea and/or startup that you didn't really consider or think of before.