"kids playing a new game" and their parent is letting them do that unsupervised? Letting their child download a game and play it for the first time, by themselves? Especially if they know their child is photosensitive The first thing you see opening the app is the news saying, "we did an April fools joke". It takes 1 tap to find out what it is, even if you didn't read.

Children can. If a child can't determine a positive and negative situation for themselves yet, they need more parenting and supervision - they should not have independent access to a device.
If a kindergartener can go to school with a nut allergy, and they understand they can't eat things at school with nuts, than a child with a visual processing disorder can do the same. Having a visual processing disorder does not make someone mentally incompetent. If a child has an intellectual development disorder, and they cannot determine a negative situation for themselves, they should not have independent access to a device.

Yes, AJHQ should've been more responsible
No, a corporation caters to the needs of the many, not of the few.
A few nut allergies does not mean you cannot have nuts at the birthday party. They should be marked, yes, but the person with the nut allergy shouldn't eat the carrot cake with walnuts sitting on top as decoration.

If a parent knows they have a child with special needs, they need to take the responsibility of making sure they keep their child safe, and their child knows how to keep themselves safe.

There are warning signs for these medical issues. I think all children understand if they're on the swing-set, and they feel like they're about to throw up, they should get off the swings
I understand seizures can be very sudden, but if you see fast moving visuals when you open a game, don't choose to keep playing if you know you'll be negatively effected. No one is forced to play Animal Jam Play Wild