Here is a very specific description into their thinking on rocky planets as candidates.  It has to do with their climate as “air conditioning”.

“We discovered that these rocky planets have three possible climates, two of which are potentially habitable.”

Exoplanets with rotation periods under 12 days, an eastward wind jet known as superrotation forms in the upper layers of the atmosphere along the equator. This wind jet interferes with the atmospheric circulation on the planet, so that its day side becomes too hot to be habitable. A second possible wind system is characterised by two weaker westward wind jets at high latitudes. The third climate option combines weak superrotation with two high-latitude wind jets. These last two wind systems do not interfere with the ‘air conditioning system’, so that the planets remain potentially habitable.

Are they right or should we stick with focusing on typical exoplanets in the search for aliens?

Feel free to comment with your theories.