Lca pivot welded to k frame

Any idea as to why someone would weld the lca pivot shaft to the k-frame? Other than the lca bushing being shot I’m not sure if it indicates something else needs to be checked. The pivot shaft nut was pretty loose and I’m thinking that’s why the bolt hole on the front of the k frame is oblonged a bit. Disassembling for repairs and ran into this.
Thanks