i wouldnt trust a rewelded wheel. its going to fail again.
While I agree with you in part, a well repaired wheel will be strong.
I probably wouldn't take it on a jump laden rally with me, but for street use, it's not too bad.
I've actually had to repair a Rota before. It was in an accident, and the Nasioc seller didn't tell me about it. He ended up making good on the repair cost, and $125 later, our local wheel shop fixed it like new. They have hundreds of wheels at any given time, from oem stuff from the expensive Euro's to aftermarket, refinishing, etc.
I sure wouldn't take it to any welder though, as these guys have the tooling and knowledge to fix a wheel. Only select few have the tools, and the skill to do it right.