Supposed we are able to absolutely confirm or deny the presence of life on Mars which didn't originate from contamination by us. What problem(s) would that sol

Supposed we are able to absolutely confirm or deny the presence of life on Mars which didn't originate from contamination by us. What problem(s) would that solve? That panspermia is possible? Would that need outweigh the need to discover how to make life survive outside of Earth? Would that not also prove panspermia is possible?