These are both examples of how OE would _not_ help you.

With google street view you're barely even in range long enough to pick up a couple packets, if the person was even using their computer while the car drove by; this is not what OE is designed to protect against. If the car sat outside their house, they'd still get owned, and OE would still not be useful.

Sitting on a cafe's wireless is literally the de-facto example of how to actively sniff or inject traffic on an unsuspecting victim. The only more bluntly useless case for OE is a state-sponsored mitm using coercion-induced signed certificates.

And you can't get rid of CAs.