Does an Exhaust Manifold Leak have to be repaired or can I just let it go? on 2002 Toyota Tundra

My mechanic says that trying to get the bolts off (I live in the "rust belt") would be extremely difficult and would probably all break. Should I get this repaired? Am I okay "safety wise"?

Asked by for the 2002 Toyota Tundra
You could just let it go unless there is an engine performance issue...
Thank you. He said it's a very small leak.