My access points are inaccessible to the public. You would have to trespass deep into my property.

Unfortunately you are up against trillion dollar corporations who think the world is their little model, active misinformation from them, blatant bribery of elected officials leading to an engineered lack of government oversight, a completely clueless population, and an exponentially increasing technical capability of surveillance.

so nobody will ever sniff them then. This is not an answer to the question.

Obviously they're concerned that their own phone will sniff them.

But what's the problem with revealing your SSID/mac address to Google or anyone else?

Also - it's still probably possible with satellites or extra sensitive gear (sats already monitor marine AIS).