Developers can and almost always do close to offer their games on multiple platforms and can even choose self hosted direct distribution of they do choose. Customers can choose to purchase their games on steam, itch, epic, Microsoft, or any of the many places they’re often hosted simultaneously. Steam is more often than not the choice people choose to use of their own free will because they perceive it as being the superior service.

Why do you believe excellence should be punished?

Valve is profitable because of the reputation they’ve built up over many years as being an incredibly consumer friendly storefront. Avoiding corporate bloat, and focusing their attention on the core aspects of their business consumers care about has allowed them to thrive where many others failed. Valve created and maintained a fantastic product. So yes.

Stream created and maintains a platform that gamers and developers want to use but more importantly, they’ve built up a reputation that people believe in and trust.

Gamers and developers are so eager to use steam because in all the years they’ve been operating, they still support and expand upon family sharing, have a fantastic refund policy (for consumers), don’t employ aggressive exclusivity deals, don’t limit download speeds behind paywalls, and provide a great review and recommendation system.

They’ve become successful due to this reputation, why should we punish them for that?

Valve created a fantastic entertainment product that people voluntarily choose to use. Why would you want to turn something people already love into something completely different? Counterproductive - especially when direct distribution is essentially free and universally accessible.

What about partially sighted or dyslexic individuals? Sure, a game like halo would need a lot of modification to be fully blind accessible, but a visual novel, for instance, might not. In my experience most visual novels are built as passion projects on shoestring budgets.

Lots of existing games have robotic narrators already (e.g minecraft), they just speak with a monotone voice. By incorporating more advance machine learning capabilities the same narrator could be capable of outputting a more nuanced and pleasant delivery for those that need it.

Using a robotic voice could make the game more accessible to blind, partially sighted, and dyslexic individuals. I’m not sure how an AI voice is inherently different than the voice that comes out of a screen reader, especially if it’s trained on the voice of employees or volunteers.