Sure, but that's a completely different conversation. We're talking about life, not habitable planets. Detection of planets is a step in the right direction but only because it helps us narrow candidates. We were already certain those planets existed without confirmation.

The Fermi Paradox is about the difficulty of confirming life while there's such strong evidence that life should exist elsewhere. These signatures only strengthens the "paradoxical" nature of the Fermi Paradox.

Also, mind you, many of those signatures come through radioastronomy.