I don't think comparing your hobby projects to Qt is apt here. First, the Qt company sells a commercial license for $79/month so that you can use the software

I don't think comparing your hobby projects to Qt is apt here. First, the Qt company sells a commercial license for $79/month so that you can use the software without GPL restrictions. The author didn't mention if they were using that or the open source version. Either way, Qt is at least partly a commercial venture. Second, there is a huge difference in the size of the respective projects if your projects only had you as the maintainer. It's not that easy to contribute to large projects. Also IMO, it behooves the larger projects to try and make their users happy especially if they want to remain alive. Finally, upon reading the article you can see that the author is not expecting free help in any way. He is simply saying that if you want Accessibility then don't use Qt unless you can implement it yourself.