There's been similar rumblings from the Wrestling world of sports entertainment, where it's technically more concerning because, well, on paper they're trying not to actually hurt each other. Mick Foley's been pretty frank about the toll it's taken on his body overall, and the damage repeated concussions seem to have done to him as part of that. And they've got a prominent murder/suicide that shook everybody up so much they tried to erase the guy from their history as part of the reaction to it.

>All of which may go some way toward explaining why I've become so
>ambivalent about continuing a series based on Street Fighter,
>which is, at heart, a game about people who travel around the world
>giving each other concussions. Now, it could be argued, and I have
>argued this point to myself, that it's set in an idealized
>fictional universe where, for all we know, chronic traumatic
>encephalopathy isn't a thing, and "walk it off with a shot of bourbon"
>is still, 1930s noir style, the correct way to treat a mild brain
>injury. It's sort of the interpersonal violence and cerebral trauma
>equivalent of those harmless vanilla porn stories where no one gets an
>incurable disease or unwanted pregnancy because that would harsh the
>mellow, man.
>
>And yet, all the same, I find myself increasingly uncomfortable with
>the notion—which, given that it's bound up in the central
>premise of the setting itself, makes continuing Warrior's
>Legacy... problematic.
>
>I suppose if I wanted to really explore the meta here, I'd have the
>characters confront this issue themselves, possibly as an
>extension/extrapolation of the qualms G has been having about enabling
>Sakura's delinquency. It's an option. What does a street fighter do
>if he's developing an ethical reservation about the very core of his
>"profession"? It's a thought. Not sure it's one I particularly want
>to build a narrative around, but it's a thought.

At best, it would explain the... severity of some of the villains in the games. But I can completely understand that the issues with grappling with the subject in context are very offputting given what you wanted to do with it when you started it.