I think that's less bad than someone losing their job, or failing to get a particular job, because they can't access a canvas-based app. Edit: The former isn't entirely a hypothetical; I know of a blind person who lost his job in 2006 because use of an inaccessible app (a Java applet running on the Microsoft JVM, IIUC) became a requirement. I try to keep that bigger picture in mind with everything I do in AccessKit.
I just wish that the people that make canvas-based web stuff would realise how awful it is and tell people. I’ve interacted with a Flutter web thing once, for something that was only targeting the web. It was very painful. Flutter was completely the wrong tool for the job. But when they advertise their stuff, do they say “look, it kinda supports the web, but if you’re actually trying to target the web, please don’t use this because it’s just not good, and can’t be good unless we rip out the canvas stuff and render to real DOM elements”? Almost never.