Because he hides in plain sight.
He takes the bus or train,
or rides a bike,
or walks, and people think to themselves, “Naww! No way thats Reeves!”
Keanu’s one of the most down to earth, “regular Joe's” in Hollywood. No sycophants following him around to cater to his every whim. No “hiding” by driving around in a $500K sports car hoping a pair of Ray Bans will disguise him. He just lives his life. I respect that.
Thanks for reading: Why doesn't Keanu Reeves get much attention when he's in public?, Sorry, my English is bad:)