So how do you refuse breathalyzer and just "get away with it"?
bladerunnerspider
How about another phrase. No one person can fill every role you need.
The person complaining about dividing relationships and being someone's other half kinda sounds like they don't have friends outside of their relationship.
Draw your own conclusions based on your relationship with [insert spouse, friend, acquaintance] and what roles you each want to fill for each other.
It's called consensus. Have three sensors and each get a vote. Typically these sensors are the same and thus can detect a failure or incorrect reading of one. This idea is used in IT around data backups and RAID configurations as well as aviation. And .. I personally would just favor the radar. If vision says go and radar says stop... stop and avoid hitting that firetruck parked on the highway. Or that motorcyclist. Or any other bizarre vision-only, fatal crashes that this system has wrought.
Also humans can hear things. So, not just vision.
Taylor "dont track my billionaire plane" Swift. She's out of touch unfortunately.