In particular, orbiting so close, they are all tidally locked 1:1 to their star, presenting always the same face. If they have any water, it is frozen on the dark side. But they might have no water anyway because they (might!) have no magnetic field to fend off the solar wind that would take away all their hydrogen, as happened to Venus.
Earth has its big moon helping it not get tidally locked, thus still spinning and generating its strong magnetic field. Probably Earth-size planets with a Moon-size moon are vanishingly rare. Dual planets might do better. Or maybe a dual moon of a gas giant, but the radiation belts of the gas giant would be a problem.
So actually-habitable planets must be much, much rarer, among those announced, than astronomy departments' PR crew would have us think. Inside moons of Jupiter and Saturn might even present a better prospect.
That is not to say actually habitable planets must be rare; rather, we can't spot them yet. But our big moon might be important.