If you can't weld, it's because you've never tried. I had zero welding experience when I bought my first welder...taught myself how to use it while building a trailer. 10 years later and the only problem I've had is with that trailer is the axle I swiped from another trailer for the project. It ain't rocket science...
"Liability" is just an excuse people use to justify their unwillingness to try something new or to tackle a project that needs to be done...or they are simply incompetent and know it.