Even if it's done for marketing, I think it's a small price to pay if it can inspire even one visually challenged person to take up programming professionally.
Perhaps someone who loved computers might be wondering around the world if he/she can ever work as a programmer. He/She might not have explored how to go about it or he/she might not be confident enough to try.
So if this story can change one person's mind, I think it's a sin worth committing.
This reminded me of RubyConf India talk I attended back in 2013 titled “Turning blind eye to rails development by Siddhant Chothe”, that was also quite inspiring.
It made me realize, how rarely we think about accessibility when developing software.
Perhaps someone who loved computers might be wondering around the world if he/she can ever work as a programmer. He/She might not have explored how to go about it or he/she might not be confident enough to try.
So if this story can change one person's mind, I think it's a sin worth committing.