and honestly, it doesn't matter. the author has no responsibility to you or to anyone to write hardened production-ready code. if his app gets rooted, it's on him, and it's honestly the responsibility of everyone that runs it to determine if that's a risk they're willing to live with.
but the quality of the code has little bearing on the fact that this product didn't exist some while ago and now it does. maybe it'll influence somebody to create a desktop version or to contribute some security fixes, or maybe it'll just spark some design discussion. it shipped and irrespective of its quality, it's making at least one person more productive.
Kudos to the author for shipping something that - like everything else - is not perfect and has room for improvement, but is out there anyway.