That would trip up gloriously on things like Pokemon.
I find these days if you don’t know the exact name of the game you want then a bot command has a lot of limitations.
Sure you can create and store alias’s, but that would require an external dashboard to create those.
Personally I feel that a bot command for setting a game is too limiting, due to the lack of UI space for effective “search for a category”
Even just removing “Just Chatting”/etc from the pool doesn’t help here, since theres often a lot of games with similar names so can easily mis match too easily.
Even more so for “hand of godded” games that were since those are often similar names, or in the example of pokemon, each generation is two games, but twitch will group them together into one category.
Or recently hitman, do you mean hitman 1,2,3, or the bundle world of Assassination? Using a bot command with a shorter name hoping to match the right thing will only go so far I feel, so if you did !changegame hitman that would hit too many games, (similar issues would exist with other games just an example I thought of, off the top of my head)