I would normally do something similar. The context in which I was seeing these warnings was that I was working on a new UI for a VST plugin using web front-end

I would normally do something similar. The context in which I was seeing these warnings was that I was working on a new UI for a VST plugin using web front-end tech, something novel for me so I was more interested in getting it to work before dealing with what the warnings meant. It was the parent comment mentioning a11y and screen-reader in conjunction that made me make the connection, I just found it hilarious that the term a11y itself is so inaccessible if you don't already know what it means!