No, it just means that if we find life on other worlds, it might share similar biology with us. Humanoids are the result of hundreds of millions of years of natural selection on Earth. Other planets would have different selection pressures, and would produce very different types of creatures.

It's still possible that some alien species might resemble us. But it's just as likely they would resemble lizards, or insects, or birds, or they may be completely unlike anything on Earth.