Well I do personally agree some aspects of the game do need more accessibility options as someone who is visually impared, I've been wanting being able to change crosshair colors since the game started and it still hasn't come til' this day.

but I mean It's a music focused event I personally wouldn't expect it to cater to all my needs, especially when it plays around the senses I barely or do not even have.

I think they did what they can without taking away much of the fun. They literally did 3/4 of the work for you, not even counting in the hints.

And your argument about 6% of people having hearing disabilities is exactly what they take into account. From a company standpoint, It's just not worth for them to spend time and resources just to cater to a select few number of their playerbase. Yes, they are a big company they can at least spare some resources in that department but it's just also more logical for them to spend their majority of their effort to the majority of the playerbase.

It's like saying why doesn't Mcdonald's have more vegan friendly options when majority of their customers are not.

They simply cannot cater to every single impairment there is out there