> or you can't use it commercially or for safety-critical things

The license for libxml2 (like the license for almost any kind of open source software) already states "THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT." I don't see how you can put the responsibility even more on the integrator/seller than that. It literally states the devs don't even guarantee it works correctly.