If you find a competent welder, it can absolutely be welded and should not be an issue in the future. Yes they do fatigue and crack, I have one that cracked on me as well.
I want to make a new bracket with more meat, longer throw of adjustment, possibly with a proper tensioning mechanism instead of the "jam a tire iron in there and yank" method
I have waaaaay too many of these "i want to make" projects. hah