IMHO I feel the title is appropriate. They are not claiming to have found life on Mars, they are making the very pivotal claim that there are forms of life that can turn liabilities on Mars into assets.
It's not misleading, this article has nothing to do with finding life on Mars.
> If humans ever build bases on Mars, they will need systems that can provide oxygen without constant resupply from Earth
Have you READ the article ? Or just misinterpreted the title and then commented ?