It's not required. At 70GHz with parabolic antennas about 30cm across (as seems to be the case) their beams will be extremely narrow, provided the antenna shape is accurate. It looks like they've machined them from solid billet, so I expect they're "perfect". Practically all of that 1W will be heading towards the receive antenna, provided both are pointed exactly at each other.
Your "crummy" (pardon the phrase) Nighthawk has got three rubbish whip antennas, and can do about as much beam forming as I can when I fart; it mostly goes absolutely everywhere.
So your nearly-omnidirectional 1W dissipates to undetectability over a much shorter range than their highly focused 1W.
The WiFi distance records are all set using parabolic antennas. In fact you can buy specialised WiFi antenna for creating longer outdoor links that have much better directionality than your average router, such as this.
Biting the hand that feeds IT
