Seven - seven only - living bacteria cells discovered on Mars

Despite dozens of probes sent to Mars annually for the next forty years, no more bacteria was ever found.

How should mainstream science assess this discovery?

This is actually only my thought experiment, but the way I feel sure this news would be assessed by most scientists is that it definitely and triumphantly disproves that odious religious claim that life is unique to Earth and by extension, it disproves all religion as well.