Accommodate? They chose to make something that runs in a web browser so they should make something that works in a web browser. If I choose to use one with big scroll bars, that's up to me.
I don't know what browser you're using, but if it's Windows or some GNU/Linux distro, from memory both of these allow you to customise scrollbars. What if I have accessibility requirements and want to customise how software that I run on my own computer works?